ANTENNAS (collection)Since 1997 we renew the "Antennas" which in 1995-96 have been published within "Radiotechnika" Journal (see "Radiotechnika"

No.7,1995; No.7, 1996). Since 1997 "Antennas" will leave two times a year.

In the "Antennas", as well as earlier, original and survey articles on the basic directions of the theory and engineering of antennas and feeder devices will be published:

the electrodynamic theory of antennas; synthesis of antennas; mirror and hybrid antennas; arrays (active, passive, adaptive, conformed, phased); low-gain antennas; super wideband antennas; strip printed antennas; antennas for space vehicles; antennas for radioastronomy and space communications; radomes; scattering characteristics for radomes and containers; feeders; semiconductor and ferrite devices for antennas and feeder devices; systems for automated design of antennas and feeders; designs and "know-how" in antenna & feeder technique; measurements.

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20041 2 3 6 7 8-9 12

20051 2 3 4 5 6 7-8

"ANTENNAS", No. 7-8(98-99), 2005

CONTENTS

Design of Log-Periodic Dipole Antennas.Yatskevich V. A., Alexandrov V. S.The simple design procedure of classical log-periodic dipole antennas including determination of geometrical parameters and the sizes of the antenna and the subsequent calculation of its characteristics by means of the popular computer program is proposed. The results of certification of decimeter wave band television antennas are used to substantiate calculation accuracy.

Modelling of the Superwide-Dband Slot-Hole Aerial of a Running Wave with Controlled Polarizing Sensitivity.Avdeev V. B., Ashihmin A. V., Berdyshiv A. V., Nekrylov V. M., Pasternak Yu. G.With the help of numerical modelling opportunities of a design of the superwide-band aerial with the controlled polarizing sensitivity constructed on the basis of crossed slot-hole printed structures of the running wave are investigated. For definition of dependence of wave resistance from width of cracks it is developed and used a method of Monte Carlo modified for a case of layered dielectric of the decision of the differential equation corresponding to Gauss law. Achievable entrance characteristics and the directed properties of the offered superwide-band slot-hole aerial of a running wave with controlled polarizing sensitivity at two possible ways of excita-tion of cracks are analysed.

Modelling of the Measuring Aerial Constructed on the Basis of the Combination Flat and Volumetric Bicones.Ashihmin A. V., Nekrylov V. M.The simple, practically flat design of the small-sized broadband aerial combining flat and volumetric biconical vibrators is offered. On the bottom frequency of a working wave band the electric length of the aerial makes approximately 1/15 part of length of a wave, thus the maximum level of factor of a standing wave on a voltage on an input of the aerial does not exceed 4. The opportunity of function-ing of the aerial in a strip of working frequencies with factor of overlapping equal 75 is shown.

Electrodynamecs Modeling of Resonance Slot Antenna Array of the Finite Size with Additional Reflector Elements.Strizhkov V. A.On the basis of analogue of integrated equation Pocklington for a magnetic field some features of radiation of finite slot antenna array with additional reflectors and the distributed modes of excitation are investigated. It is estimated: influence on parameters of an-tenna array of regional effects, type of excitation and an additional reflector.

Radiating stripe line with modulated wave impedance.Fedotov A. Yu.The opportunity of creation of the antenna as a section of a long line with varying wave impedance is shown. The procedure of calchlate of such antenna permiting to define the law of change of with strip line along the line depending on the required directional pattern (DP), wich choose out of a class realizable DP. The calculated and experumental data are performs.

Synthesis of Agreeing Devices for Aerials Radio-Electronic Means with Manipulation of Amplitude and Phase Radiate of the Signal.Golovkov A. A., Chaplygin A. A.Parities between resistances of a source of a signal, the aerial, a controlled element and elements of a matrix conductivity agreeing devices, initial for synthesis by criterion of maintenance of required laws of two and three-level change of amplitude and a phase ra-diate a signal on the set quantity of frequencies are received. Some circuits of such agreeing devices for a case of interpolation of required attitudes of modules and differences of phases factors of transfer of aerials on three frequencies

are synthesized.

Scattering Characteristics of the B2 Bomber in the Short-wave Range.Kudin V. P.Moment method is applied to investigation of B2 bomber's radio cross section in short wave band (5-50 MHz).

Superwide-Band Antennas Arrays on a Basis of Printed Biconical Vibrators with the Metal Screen.Avdeev V. B., Ashihmin A. V., Berdishev A. V., Pasternak Yu. G., Popov I. V.On the basis of numerical modelling with the help of the software package "Zeland" prospects of use printed biconical vibrator with the metal screen are proved as a base element of superwide-band flat antennas arrays of normal (axial) radiation. On the basis of the analysis of results of calculations of the basic characteristics of the offered various types of antennas arrays and their variants of bringing voltage preferable designs, in particular, a compact square array from four base elements, with bringing voltage by the ir-regular on width are revealed by a strip line. It is shown, that the factor of overlapping achievable in such array on frequency makes not less than 3.

Choice of the Optimum Configuration of the Array Antenna, Placed on the Mast, in Mobile Direction Finding Com-plex of VHF-UHF Ranges (-0 MHz).Dubrovin A. V.The technique of a choice of an optimum configuration by the eight-level array antenna placed on a mast, for a direction finding com-plex of VHF-UHF ranges is offered at presence constructive, technological, overall dimensions and electromagnetic restrictions. The configuration of the array antenna, having the best parameters from the point of view of reception of the best accuracy of direction finding at a minimum level of lateral petals of likelihood function (the diagram of an orientation) is offered.

Investigations and Potimtzation of Requirements to Antennas of the Point-to-Multipoint Communication Betworks of Millimetric and Centimetric Wave Bands.Levchendo S. N., Skorodumov A. I., Dharlanov Yu. Ya.The investigation and system parameters optimization were carried out for antennas and masts of mobile stations of the point-to-multipoint communication networks operating at millimetric and centimetric wave bands. It is shown, that for the preset conditions there are exsist optimum values of antennas gains and axial asymmetry patterns that provide maximum communication range.

Estimation of Ground Influence on Radiation Characteristics of a thin Electrical Vibrator.Shorokhova E. A., Kashin A. V.Ground influence of the radiation partern, radiation resistance, input impedance and other characteristics of a thin electrical vibrator was studied.

Quasioptimal Method to Form Vector Pattern of Monopulse Antenna Arrays with Simultaneous Forming of Beams.Bashly P. N., Klimukhin D. V., Manuilov B. D. The quasioptimal method to form vector pattern of amplitude sum and difference monopulse antenna array with

simultaneous form-ing of beams is given. The method is based on control complex amplitudes in part of radiators of antenna array. The comparison of suggested method with optimal solution is fulfilled.

Energetic Radiation Patterns.Samsonov A. V.Using space-time existential transformations of decisions of non-uniform equations Maxwell power diagrams of an orientation of the flat inphase and linear discrete aperture are received.

The estimation of resulting accuracy of non-linear antenna's measurements by method of interval analysis.Ivanov A. V., Kuzmonov Yu. V., Panitchev S. N.The mathematical models for estimation of resulting accuracy of antenna's nonlinear measurements deal with theory of interval analysis are given. Some methods of integral estimation of measurements errors are described. The review also presented some practical recommendation for application of interval analysis method into sphere of antenna's measurements.

Instrumental Errors of Full Power Gain Factor Measurement of Aperture Antenna of Arbitrary Polarization in Microwave and UHF Ranges.Anisimov L. A., Heiman V. D., Pasmanik L. A.The analysis of instrumental errors of aperture gain factor single measurement in microwave UHF ranges is given. The equations of gain factor measurements using two and three antenna methods are derived. Using these equations we obtain formulae for calcula-tion of instrumental errors of gain factor measurement in accordance with errors defined by measurement equipment.

The Characteristics of Antenna Array for Radio Finder on the Limited Surface.Nechaev Yu. B., Vinokurova N. N., Kuz'menko Yu. V.On the basis of strict electrodynamics methods the model of antenna array (ÀA) on the limited surface arbitrary configuration for ra-dio finder with small base is constructed. The numerical analysis of influence round surface on a maximum phases difference for a three-element AA is conducted.

The Polar-Sensitive Method of Direction Definition of the Propagation of the Ground and Ionospheric Radio Waves.Vinogradov A. D., Levashov P. A.The polar-sensitive method of direction definition of the radio waves propagation realized with the usage of three-element antennas system and providing direction-finding at reception of the ground and ionospheric electromagnetic waves is examined.

A Matrix Method for Estimation of Radiolocation Characteristics of Objects in the Near and Far Zones of Irradiation and Accept.Pon'kin V. A., Martynov N. A., Kir'yanov O. E.The new calculation-experimental method of an estimation of radar-tracking characteristics (RTC) of objects in near and far zones of an irradiation and the reception based on a posteriori processing of the matrixes of fields scattered by objects with use of system in-dependent near-omnidirectional send-receive antennas

is considered. The results of mathematical simulation confirming efficiency of a matrix method of measurement RTC of objects are presented.

Estimation of Irradiation Fields in the Operating Volume of Measuring Complexes by the Results of Measurement of Standart Reflectors' Scattering.Zubkov S. V., Kir'yanov O. E., Pon'kin V. A.The question of control of the illumination field in operating volume of measuring complexes is examined. The method of evaluation of illumination field structure with considerable distortion based on measuring of the diagram of backward scattering of the test sys-tem consisting of two scatters and evaluating of parameters of the analyzed field on the movement trajectory of one scatter and lin-ear approximation of the field parameters within the whole operating volume is suggested. The results of mathematical modeling of resetting of the illumination field with regard of reflection of electromagnetic wave from the earth surface are given.

"ANTENNAS", No. 6(97), 2005

CONTENTS

Synthesis antenna array with usage of the modified algorithm Widrow for adaptive arrays.Khabarov A. V.The algorithm of adapting array, obtained as a result of development is considered known Algorithm of adapting by matching with the measurement standard, originally offered B. Widrow. The algorithm differs by that as the measurement standard the amplitude of a useful signal is used only. The modification of algorithm was executed with application of methods artificial Neural Networks. The en-gineering method of synthesis antenna array is offered on the basis of the modified algorithm.

Field intensity of goniometric antenna radiation with dipole in near and far regions.Pakhomov I. A.Formulas for calculation electric and magnetic field intensity of loop antennas, located on z0y and z0x planes, are derived. With the help of obtained formulas calculation of electric field in near and far regions goniometric antenna with dipole is implemented. Goni-ometric antenna consist of two equal loops, located on z0y and z0x planes, whose centers are positioned on coordinate origin.

Increase of detection range of hardly noticeable radar targets at use of UWB signals.Lagovsky B. A.The adaptation of radiating and receiving radar systems to the characteristics of reflection of the complex radar-tracking targets is carried out. It allows essentially increase the signal-to-noise merit in a received signal at use of UWB signals. The methods of forma-tion and processing of UWB signals based on radar-tracking measurements of the characteristics of reflection and mathematical models of the targets are offered.

Mathematical Modeling of a Direction-Finding Double-Level Dipole Array by the method of Hallen's Integral Equations.Ashihmin A. V., Pasternak Yu. G., Ostankov A. V.By Hallen's integral equations means is shown, that used of double-level dipole antenna array allow to increase the direction-finding uniqueness of the radio-frequency radiation sources in the wide frequency band.

Investigation of metal-dielectric resonator with a thin metal film.Belov Yu. G., Kudryavtsev A. M., Pikhtelev N. A.The cylindrical microwave resonator with dielectric bush and metal film on its internal surface is investigated. The results of research of influence of dielectric bush's parameters and film's thickness on characteristics of resonator are represented and analyzed. The questions of practical application of such resonator and, in particular, the possibility of its using for determination of rubidium's quan-tity in the cell of rubidium standard of frequency or in spectral lamp are considered.

Once again about property of the nonsymmetrical coaxial log-periodic antenna.Yakovlev A. F., Pyatnenkov A. E., Cherepanov A. R.Results of experimental investigation of electrical characteristics of nonsymmetrical coaxial log-periodic antenna (NCLPA) in more high frequencies than frequency independent range are presented. It is shown, that NSLPA has good matching with a feeder and more high directivity in additional frequency range.

Synthesis of antennas with a small field area in a near zone.Katsenelenbaum B. Z., Levin B. M.Three types of small-sized unsuperdirective antennas designs are described, in which near zone there is an area with a small field. This area is formed as a result of mutual suppression of antenna various sections radiation. The electrodynamics calculation meth-ods (analysis and synthesis) of such antennas are given.

Null Part Synthesis in Patterns of Monopulse Antenna Arrays.Bashly P. N., Klimuhin D. V., Manuilov B. D.The analyze of efficiency of different methods of null forming in total and difference patterns is performed. The methods are based that on correction of amplitudes and phases of currents in part of radiators. The recommendations about choosing of position radia-tors are given.

The Influence of a Conducting Ground on Radiation of an Elementary Vertical Electrical Dipole in the Band of Frequency 300-3000 kHz.Katin S. V., Shorokhova E.A., Kashin A. V.The influence of a conducting ground on radiation of the electromagnetic waves by an elementary electrical dipole located in an air in the band of frequency 300-3000 kHz is studied; using the duel integral Fourier transformation the exact solution of the problem about radiation of the electrical dipole nearby boundary between air and stratified grounding structure is obtained; the longitudinal compo-nent of the electric field, and the radiation resistance in relation to geometrical and electrophysical parameters of the problem are calculated numerically and analyzed.

The Ultra Wide-Band TEM-horns with Longitudinal Changes of the Wave Resistances.

Avdeev V. B., Ashihmin A. V., Pasternak Yu. G.The results of numerical and experimental researches of TEM-horns along which axis the wave resistance smoothly changes from 50 Ohm on an input up to 377 Ohm in radiating aperture are resulted. Opportunities of essential expansion of a working strip of fre-quencies with factor of overlapping ~ 25 are shown due to selection of the law of change of wave resistance.

The Method of the Standing Wave Factor Measurement.Kostrov N. A., Litvinenko V. P., Litvinenko I. V., Terskih P. I.The method, proposed herein is based on the aerial impedance measurement, and used to calculate the Standing Wave Factor (SWF) for any transmission line resistance of the aerial matching system.

Suppression of Higher Type Waves in SML with Using Resistance Films.Maistrenko V. K., Radionov A. A., Svetlov S. N.In this paper is shown the calculating algorithm of S-matrix of shielded microstrip line (SML) with various resistance films into sub-strate. The numericul results confirming selectivity of higher type waves suppressing is given.

"ANTENNAS", No. 5(96), 2005

CONTENTS

System approach to designing of the ferrite components of UHF range for onboard radars.Kozlov V. A.The main principles of the system approach to designing of the ferrite components of UHF range for on-board radars are considered. They are based on using the specific features of the ferrite devices: firstly, possibility to achieve one and the same electric character-istics for several alternative variants of constructions and operationg modes and, secondly, possibility to implement multifunctional operationg modes including non-linear ones.

Designing of the skip band waveguide-slotted arrays in the Yu.E. Sedakov research institute of measuring systems.Kashin A. V.The results of multibeam waveguide-slotted arrays designing with fixed radiation parameters in the Yu.E. Sedakov research institute of measuring systems (NIIIS) are presented.

Calculation and technology of production of ferrite elements for EHF switches with "internal" magnetic memory.Kozlov V. A., Svetlakov Yu. A.There are offered approximate calculation method of geometry and technology of production of Y-form ferrite elements for switches of EHF range, based on rectangular waveguides.

Anout wave spectrum of circular waveguide with axial longitudinal magnetized

ferrite rod.Vipritskiy D. D., Nazarov A. V., Raevskiy S. B.The results of solution of boundary problem for circular waveguide with axial longitudinal magnetized ferrite rod taking frequency de-pendence of magnetic conductivity tensor elements into account are given. The features of wave spectrum in this guide structure are considered.

Opportunities of use shielded waveguides in millimeter-wave's range.Biryukov V. V., Raevskiy S. B.The influence of a roughness of a conducting surface on its electrical properties is considered. The conclusion is made, that at ac-count of devices working in a range up to 300 GHz, it is possible to neglect a roughness of conducting surfaces.

About calculation of waveguides with a composite cross-section profile by a method of partial areas with an ionization continuum of eigenfunctions.Belov Yu. G., Ishen'kina Yu. W.In stringent statement the solution of a problem on calculation of the semicircular H-shaped waveguide is reviewed. The numerical outcomes are adduced for one of particular cases of the considered waveguide.

Features of electromagnetic waves in circular wave-guide with multi-level dielectric completing.Kalmyk V. A., Mochalov A. V., Tyurin D. V.Calculation results of higher-order mode dispersion characteristics are presented in this article. It is shown that dispersion character-istics of waves with the same azimuthal index are not intersected. Calculations of power flow distribution for different wave mode are displayed. Power flow density distribution for the same wave may undergo heavy changes if frequency changed. The recommenda-tion for improving of wave mode classification in circular nonuniform wave-guides with compound infill is given in the article.

To problem on statement of internal problems of diffraction.Raevskaja Yu. V.The problems of statement of internal diffraction problems, bound with allowance for in bases presenting field in partial areas, surges with complex wave numbers are esteemed. On the basis of a problem about excitation of fields the demarcations of areas of guides of frames depicted by the self-conjugate electrodynamic operators, give the guidelines on formation of bases of partial areas.

Research a Microwave Probing System for Noncontact Diagnostics of Galloping Processes.Budaragin R. V., Orehov Yu. I.In rigorous electrodynamics statement the task of diffraction on the junction two-layer circular shielded waveguide (TCSW) and circu-lar shielded waveguide (CSW), with a metal slice on extremity is solved. The numerical outcomes are represented for dielectric waveguide of a constant section and with a cusp. For this case the convergence of solution a diffraction task from number of eigen waves TCSW and CSW, which are taken into account in expansions of fields is investigated.

Calculation algorithm of a full spectrum of eigenmodes of cylindrical

inhomogeneously filled resonators.Bajilov V. A.The design procedure of a full spectrum of eigenfrequencies of the cylindrical oscillatory system formed by a set of concentric dielec-tric rings, placed in a coaxial metal cavity with an axial metal rod is considered. The calculation algorithm developed on the basis of a method of partial areas with decomposition of electromagnetic field on eigenfunctions of parallel-plate radial layered waveguides, has fast convergence. Comparison of results of calculation with the data of works of other authors, and also with results of own experimental researches is carried out.

Signal conditioning unit for the rectangular waveguide.Malahov W. A., Raevsky A. S., Raevskaja Yu. W., Starodubrovsky R. K.The calculation of fixed load for the rectangular waveguide is esteemed. The calculation is made by a method of the coordination of wave drags of a rectangular coaxial and homogeneously of filled rectangular waveguide. The matching computational and experi-mental data is made.

On Distribution of Electromagnetic Waves in Periodically Inhomogeneous Mediums in the Direction of Their Propagation.Raevskiy S. B., Smirnov A. A., Shishkov G. I.Problems of distribution of electromagnetic fields in unlimited mediums which index of refraction periodically vary in a direction of propagation of a wave are considered. Results of a solution of dispersion problems in E and H - statements are reduced.

"ANTENNAS", No. 4(95), 2005

CONTENTS

Decameter waveband pick-up aerial matching systems.Kostrov N. A., Litvinenko V. P., Terskih P. I.The impedance-matching transformers, described herein, are intended to work as constituent parts of pick-up antenna feeder chan-nels, so that the Standing Wave Factor exceeds the value of 2 in the decameter waveband. The research has been carried out in or-der to see whether it is possible to extend the operating frequency band up to the point of 200 megacycles, by utilizing multiband matching systems.

Effective algorithm for a solution of multiparametric tasks - particle swarm optimization.Kozlov K. V., Los' V. F.Effective algorithm for a solution of multiparametric tasks optimization is described. The example application of this algorithm for an-tenna design is presented.

The Singular Integral Representation of Electromagnetic Field in Near Zone of Electric Dipole.Neganov V. A., Klyuev D. S., Efremova A. A.The computing method of electromagnetic near field of radiate structures is proposed. The getting singular integral representations (SIR) of electromagnetic field components allow to compute this field in any point of space by integrating of

longitudinal component surface current density of dipole. They use the thin dipole model, in which dipole is representing as infinitely thin filament with cur-rent. This model reduces to Pocklingtions or Hallens integral equations, which are Fredholms integral equations of first kind.

Features of a numerical analysis of dipole radiators in presence of laminated mediums.Pimenov Yu. V., Proshin A. V.The method of calculation of improper integrals arising at the analysis of electromagnetic fields, created by radiators located near to a demarcation of the environments is offered. The method allows essentially to improve convergence of the indicated improper inte-grals, by transformation of an integrand at large values of argument. The outcomes of calculations verifying efficiency of an offered method are adduced.

Effectiveness of spatially compound emission feeding in a single - mode waveguide.Dubrovin V. F.Problems of multimode sources emission feeding in a single - mode optical waveguide have been considered. The analytical ex-pression developed for the estimation of the effectiveness of the waveguide excitation together with the computational graphs is pre-sented.

Indemnification of regular mistakes of direction finder on basis neironnetwork's algorithms of processing of the information with training according to natural experiment.Afanasjev V. I., Ashihmin A. V., Kozmin V. A., Maslov O. V., Razin'kov S. N., Orphan À. À.The algorithm of indemnification of regular errors mobile direction finder complexes on a basis algorithms of processing of spatial - frequency distributions of signals is proved by the multielement aerial of a lattice. Results of an estimation of an achievable average square-law mistake of measurement of angular coordinates of sources of a radio emission in a range of ultrashort waves 80 … 220 MHz are resulted according to natural experiments.

Principals of formation of the operating programming measuring complex for the antenna metering.Believ V. V., Uzhakhov T. S.The basic trends of modernization of the current measuring systems are formulated for the development of the range operating pro-gramming measuring complex with the aim of automatization and reliability improvement of the research results of space-energy characteristics of electronic devices. The experimental check of realization of the suggested technical conclusions and systematical approaches has been conducted on the base of the method of physical simulation.

Electromagnetic wave diffraction by finite conductivity echelette with bars.Kotljar A. V., Shaldaev S. E., Shkil V. M.On the basis of a method of the half-manipulation with use of impedance Leontovich's boundary conditions the problem of diffraction of waves by finite conductivity echelette with bars is solved. Influence of a jet impedance of one of sides of echelette

on diffractions properties of examined structure is investigated. The basic attention is given to dispersion is linearly frequency-modulated signals.

Transformation invariants of impedance arc through a linear reciprocal passive lossless two-port.Borodulin A. A.It is established experimentally that by continuously varying the bias of a semiconductor diode, its impedance maps out an arc of a circle in the complex plane. Two functions of the geometric parameters of the arc are derived that are invariant under the transforma-tion of the arc through a linear reciprocal passive lossless two-port. It is shown that values of these invariants determine the charac-teristics of an analog controlling device with a given diode.

Principals of formation of the system of calibration of the ground measuring radar station with developed power potential and sensitivity at small angles of sight.Gorkin Yu. S., Myazin V. N.The role and features of system of calibration of the ground measuring radar station with developed power potential and sensitivity are examined. The content and demand for the group standard of the Radar Cross Sections (RCS) of dispersion intended for the ra-dar station calibration of millimetre, centimetre and decimetre band of wave length are determined.

"ANTENNAS", No. 3(94), 2005

CONTENTS

The computation of the of the input impedance of the electric dipole by the singular integral equation method.Neganov V. A., Klyuev D. S.In this paper input impedance of the electric dipole is defined as division of the voltage by the current in the point of power. The cur-rent is defined by the singular integral equation method. The complex current distributions along the one half wave dipole and one wave dipole are computed. The real and imagine parts of the input impedance of the electric dipole for different length of dipole are computed.

Antenna arrays with encoded ultrawideband signals directivity features.Nechaev Yu. B., Radchenko Yu. S.This letter examines directivity properties of the equidistant antenna array receiving encoded ultrawideband pulse sequence. Two techniques for sequence code modulation - binary amplitude and ternary positional are studied. It is found that the structure of en-ergy antenna pattern depends greatly on the correlation properties of the signal processed. It is also shown that the structure of an-tenna array pattern can be controlled through variation of signal parameters.

The single-wire antenna with a varied diameter of a wire.Fedotov A. Yu.The theory of the single-wire antenna with a periodically varied diameter of a wire is

offered; the conformity between the geometrical sizes, law of variation of radius of a wire and current as three running waves proceeding in this wire is established. The calculated and experimental data is performs.

On the Development of Distributive Adaptive Antenna Couplers.Hlopushin I. Yu.This paper gives the description of antenna coupler composed of a part of transmission line (delay circuit) which has connected to it or disconnected from it additional capacitors; the connection algorithm depends on the voltage value and reflection coefficient at a particular line section. Measured parameters of a relay control model for this device are given.

The radiation characteristics research for the infinite flat waveguide eqvi-distant array with the open ends.Evstropov G. A.The method research of the characteristics radiation based on the Winer-Hopf technique for the solution of partial differential equa-tion. The E and H-waves were researched the E and H-waves in the waveguides. The formulas for the reflectance, the coupling coef-ficient, the transformation ratio and also the precise expression for partial radiation pattern were elaborated, when only one the waveguide exiting. The calculation results for the reflectance, the coupling coefficient, the transformation ratio, the partial radiation pattern and the elements of the dissipation matrix are given, when only one the waveguide exiting.

Resonant length and coupling coefficient of the longitudinal slot in the rectangular waveguide broad face, displaced from its center line by a distant less than slot width.Zavodov L. V., Koshkina T. V., Maximov O. M.The procedure is proposed to calculate electrodynamics characteristics of the narrow longitudinal slot in the rectangular waveguide broad face which center line asymmetrically divides the slot aperture. Calculated and experimental data are compared.

Angular-time, angular-frequency and angular-energetic characteristics of radiation and reception of nonharmonic signals.Avdeev V. B.The features of the description in time and frequency areas of the basic characteristics of aerials and antennas systems radiating and accepting nonharmonic signals are considered. Examples of introduction of the parameters which are taking into account local and integrated features of behavior of characteristics are resulted.

Solution of a three-dimensional problem of a wave diffraction on a Group Bodies by the pattern Equations. Methods. Kyurkchan A. G., Skorodoumova E. A.The explicit (asymptotic) solution of a problem is obtained in a case, when the scattering bodies are far enough from each other. It's established, that the obtained approximate analytical solution of a problem is suitable for calculations with an acceptable exactitude at distances between bodies down to their touch, if the sizes of bodies do not exceed a wave length of a field, incident on a group.

Lanes selection for the airplane.Verba V. S.Within the framework of restrictions on the airplane distance from a site of the analysis, on height of flight and for getting the maximal probability of detection of ground means the technique of a selection of an optimum lane of the airplane is considered.

Object EMC-Factors.Perfilov O. Yu.It is worked out the factors determining the object EMC: sharing factor (SF), antenna pattern distortion factor (PDF), antenna input impedance distortion factor (IDF). It is presents the culculation algorithms of these factors. The analytical mutual influence is deter-minated between EMC-factors, if SF?10 dB.

The investigation of influence monopole car antenna location on reception characteristics FM-radio signal.Gainutdi-nov T. A., Strashko Yu. V.Analyzed general trends, connected with the nature of changing a pattern when moving a receiving monopole at car corps in FM-band. Also brought results of the calculation of minimal directivity antenna dependencies from location on corps and geometrical pa-rameters. Indicate the best variants of antenna location.

"ANTENNAS", No. 2(93), 2005

CONTENTS

Antenna and Waveguide Systems Developed in V. Tikhomirov Scientific Research Institute of Instrument Design.Sinani A. I.The most powerful results of research and development works fulfilled (realized) in antenna department of V. Tikhomirov Scientific Research Institute of Instrument Design (NIIP) from the date of its foundation in 1955 are presented (are stated). The originality of the technical solutions and design styles (techniques) becoming a basis of antenna high quality created in institute is noted. The high estimation of scientific school of the antenna technician (experts of antenna systems of the NIIP, created by the Principal designer, Dr. of Technical Sciences, professor Boris Sapsovich is given.

Designing Features of Phased Array Antennas (ESA) Mounted on Mechanical Drive Unit and Some Problems of Mastering of Their Mass Production.Chalykh A. Å.The basic principles of creation ESA "Bars" of fighter SU-30MKI worked out in V.Tikhomirov Scientific Research Institute of Instrument Design in the town of Zhukovsky are considered; some problems aroused during mass production of these ESA at Ryazan Stat Instrument Making Enterprise are discussed.

The "Pero" and "Skat" Antenna Systems. The Results of Designing and Testing.Barinov N. N., Blokhin A. E., Voronejtsev A. V., Gribanov A. N., Ivanov P. M., Loskutov B. P., Mitin V. A., Moseychuk G. F., Nezvinskiy A. N., Pozdnyakova R. D.,

Yastrebov B. P.The problems of designing are considered and the testing results of the antenna systems on the basis of the phased array with beam electronic control intended for the radar complexes modernization for the fighters of various types are adduced. The techniques (expedients, ways) of improvement of the directional characteristics and expansion of phased array functional capabilities are considered.

Design of Fadiation Systems for Antennas with Electronically Controlled Beam.Alekseev O. S., Sinani A. I., Gribanov A. N., Moseychuk G. F.The principles of radiating system designing of phased array antenna ensuring maximum use of the surface at predetermined side lobe level are considered. The selection of the radiator is substantiated. The possible sources of appearance of side lobes ate analyzed.

Control of the Pattern Shape in Antenna Systems with Electronic Beam Control.Sinani A. I., Moseychuk G. F., Gribanov A. N.The control experience of the pattern shape in antenna systems with electronic beam control is generalized. The examples of various patterns realization in real prototypes of airborne phased array antennas are adduced.

The Distribution Systems of Microwave Signal (SHF-signal) in Antennas with High Power Efficiency.Pozdnyakova R. D., Mitin V. A., Sinani A. I., Vinyarskaya N. A., Yastrebov B. P.The history of creation (making) and improvement (perfection) of SHF-energy multifunction system in antenna aperture for the last 50 years of NIIP development, beginning from "optic" and finished by waveguide distribution systems for phased arrays in stated. The designed principles of build-up (creation), techniques (methods) of mathematical simulation, designing, technique (engineering), the results of experimental research and serial manufacturing application (introduction in serial manufacture) are analyzed.

The Ferrite Phase Shifter.Sapsovitch B. I., Starshinova E. I., Chalykh A. E., Sinani A. I.The results of development of miniature ferrite phase shifter with small losses and power consumption for airborne phased array are presented.

The Phasing Systems of the Phased Array.Voronejtsev A. V., Starshinova E. I., Sinani A. I., Barinov N. N., Nezvinskiy A. N.Two methods of the construction (production, making) of phasing systems of phased array are considered. Both methods characterizes by high accuracy of the installation of phase distribution in the aperture. The examples of entering functional units construction are shown.

The Results of the Beam Control Unit (BCU) Development Unified for Application in the Phased Array and Active Phased Array.Loskutov B. P., Nezvinskiy A. N., Petrovskiy A. E.A concept of constructing the family of unified beam control units is presented. The units designed for using in different passive phased and active phased arrays are made on the basis of the MCS-196 microcontroller, PLD and Flash Memory. The block diagram and technical characteristics of one particular unit are presented.

Mathematical Model of an Antenna System with Beam Electronic Control, Features of Construction (building) and Results of Application.Alekseev O. S., Gribanov A. N., Krylov P. K.The mathematical model of antenna system with beam electronic control fulfilled as program - computer complex, including mathematical models of basic functional microwave devices (units) and systems of phased array antenna with their element basis (base) are represented. The mathematical model is tested by results of an experimental research.

The Principal Distributor of Microwave Energy for Low-sized Phased Array with Optimization Characteristics of Radiation.Pozdnyakova R. D., Yastrebov B. P., Epishkina V. N., Mitin V. A., Gorshkov S. D.The results of development and researches of the principal electrical distributor for optimization of antenna system with wave-propagating distribution system on sum and difference channels in one plane are stated. The construction circuit (creation circuit), the principle of operation, architecture (construction) and SHF-performance in a wide frequency band are considered.

Active Phased Array. The Concept of Creation (build-up) and Experience of Development.Sinani A. I., Alekseev O. S., Vinyarskiy V. F.The feature and operational conditions of active phased array in different types of air-force equipment are considered. Its technical and economic efficiency is analyzed.

Semiconductor and Hybrid-integrated Devices.Sinani A. I., Kuzmenkov V. M., Vinyarskiy V. F., Lapshin V. I., Strunskiy M. G., Vasyukhno O. I.The results of development of design style and technique of the wide product range of microwave devices (SHF-devices) (phase switches, attenuators, modulators, the systems of distribution and phasing of phased array etc.) oriented on application of packageless pin-diodes both in waveguide and in microstrip transmission lines are considered.

The Ferrite Waveguide Section With Quadrupole Magnetic Field and its Application in Controlled Microwave Devices.Mamonov A. I.The physical principles of operation of ferrite waveguide section of quadrupole field control and its application results in electrically controlled microwave devices are stated.

To Computation of Microstrip Lines Used in Various Microwave Devices.Samurina L. L., Sinani A. I.The computation questions of microstrip lines on various dielectric substrates taking account of the dispersion are considered. The conclusion are confirmed by the experimental data.

The Control of Side-lobe Level of the Phased Array with the Help of the Modificated Dual-mode Phase Shifter.Mamonov A. I., Gribanov A. N.

The expedient (means, way) of the control of a side-lobe level of phased array with help of the modificated dual-mode ferrite phase shifter at use it in phasing system of antenna array is presented (is given).

"ANTENNAS", No. 1(92), 2005

CONTENTS

From Editor

Multielement Ka Band Phased Array.Denisenko V. V., Dubrov Yu. B., Korchemkin Yu. B., Makota V. A., Nikolaev A. M., Tolkachev A. A., Shitikov A. M., Shishlov A. V., Shubov A. G.This paper describes the millimeter wave antenna for radar with phased array of 3600 radiators. The technical performances of antenna and their components are presented, the operating features are considered.

An Experience of Elementwise Calibration Methods Without use of Phase Measurement Apparatus for Multi-Channel PAA Calibration.Bondarik A. V., Shitikov A. M., Shubov A. G.Some known elementwise methods of PAA calibration are considered, without use of phase measurement apparatus. Features of these methods are described for the case of multi-channel phased array antennas (several hundreds or thousands of channels). Calibration algorithm is suggested for this case, it consists of antenna channels grouping, in-group channel calibration and, finally, mutual calibration of groups. A method for initial phase distribution creation is suggested, to ensure proper level of common antenna signal. Calibration procedure for the cases of 192-channel and 3600-channel antennas is described.

Task of Creating Multi-Faced and Multibeam DBF Antenna for High Altitude Platform Station. Stages of Development.Bon-Jun Ku, Yang-Su Kim, Byung-Su Kang, Do-Seob Ahn, Belyaev A. S., Vladimirov N. V., Ganin S. A., Egorov Ye.N., Suserov Yu. A., Shishlov A. V., Shitikov A. M., Shubov A. G.Perspectives of creating the multi-beam antenna for Stratospheric Communication System (or HAPS) with Digital Beam Forming (DBF) are considered. Advantages of such antenna are demonstrated in comparison with the antenna having Analogue Beam Forming (ABF). To cover the service area from nadir to a circle of radius 55 km by 199 beams, the antenna system of seven flat Active Phased Array Antennas (APAA) is proposed. As the initial stage of the work, results of designing the demonstrative laboratory breadboard of 19-element planar receiving APAA that forms 7 beems are presented.

Research of planar array antenna with flat-topped radiation pattern for perspective base stations of mobile communication.Soon Young Eom, Cheol Sig Pyo, Soon Ik Jeon, Ganin S. A., Shishlov A. V., Shubov A. G., Tscherbenkov V. Ya.Results of the research work on creating antennas with flat-topped radiation pattern in

the azimuth plane for perspective base stations of mobile communication are presented. At this stage, the simulation of the antenna elements was carried out and the breadboard of the planar array antenna has been manufactured and measured. Comparison of calculations and experimental data are given. Future trends of the antenna development are considered including the use of Active Phased Array Antennas (APAA) with Digital Beam Forming (DBF).

Application of polarization current integral equations to analysis of waveguide arrays with protruding dielectric elements.Skobelev S. P., Yang Su Kim, Bon Jun Ku, Do Seob Ahn, Shishlov A. V.An infinite array consisting of stepped dielectric-filled parallel-plate waveguides with protruding dielectric elements and excited in the TEM modes is analyzed with using an integral equation for electric field (polarization current) in the protrusion and mode matching in the waveguide aperture. The integral equation is solved by the Galerkin method where vector eigenmodes of the corresponding resonator are applied as basis and testing functions. Some numerical results characterizing both the algorithm operation and the array properties are presented and discussed.

Reconstruction of antenna radiation pattern by using data of measurements in a Fresnel region with test facility intended for far-field measurements.Vilenko I. L., Meduhin A. A., Suserov Yu. A., Tobolev A. K., Shishlov A. V.The method of definition of an antenna radiation pattern on the basis of amplitude-phase measurements in a Fresnel region is presented. The restoring of one section of RP in a far-field region requires measurements of several sections in a Fresnel region. The mathematical justification of the method, results of computer and experimental simulation, and also examples of usage of the method in the an-echoic camera of 80 m in length are presented. The test facility intended for far-field measurements is used.

Two-Reflector Antennas with Fan Beam.Vilenko I. L., Tobolev A. K., Shishlov A. V.The approach to synthesis of surfaces for two-reflector antenna with a fan beam and low cross-polarization level is considered. The fan beam is provided due to elongated form of the reflector aperture, and low level of cross-polarization and side lobes - due to an axisymmetric scalar feed horn. Data on computer simulation and experimental check of antennas with fan beams 4 10 at Ñ- band and 2.5 10 at Êu-band are presented.

Analysis of characteristics of a parabolic antenna irradiated by the focal field.Shalyakin A. I.Analysis of characteristics a parabolic antenna at an irradiation by a field matched with a field in her focal plane is carried out. The table of the basic characteristics of the antenna depending on number of ring sign-variable zones of a focal field and a angle of aperture of the antenna is given. The irradiator using one zone is considered.

Synthesis and Efficiency Evaluation of Hybrid Antennas with Shaped Reflectors.Reutov A. S., Shishlov A. V.In the paper, a numerical optimization algorithm for the hybrid antenna with shaped reflector is considered. As an example, the algo-rithm is applied to a hybrid antenna with linear feed array for one-dimensional limited beam steering.

"ANTENNAS", No. 12(91), 2004

CONTENTS

Diffraction of electromagnetic waves on is frequent-selective radiotransparent envelopes. Yu. V. KotovThe problem of falling of an electromagnetic wave on is frequent — selective radiotransparent envelopes representing perforated regular grating of holes of the arbitrary shape in a metal screen is considered. The phases of the electrodynamic solrtion of a problem for finding of die backers of dissipation of frame of holes of the composite shape are submitted: H-figurative, X-shaped and other. The directional diagrams (DD) and operating ratios of a surface of envelopes are determined a band of a transparency.

Modeling of parabolic reflector zntennas with non-uniform surface impedance correction.I. F. Budagiyan, G. G. ShchuchkinThe solution of two-dimensional diffraction problems of electromagnetic waves on the parabolic reflector antennas with nonuniform impedance edges, which are realized via a tapered resistive film, is considered by method of the integral equation. Behavior and modeling of an electromagnetic field angular distributions near the edge of a non-uniform impedance half-plane is estimated. The numerical diffraction analysis will be carried out in a targed zone of compact range reflector. Modeling results of the mirror non-uniform impedance antenna's characteristics, taking into account a real source function and UWB reflector antennas, is considered.

Multi-frequency techniques for antenna measurements and test facility certification.A. V. KalininWe consider the techniques for precise antenna measurements and for determination of field, scattered in facility, which consist of registration of measured complex signals on a number of frequencies and Fourier transformation of data to time domain for separation of antenna under test field signal and an interference caused by scattering.

Investigation of capabilities of multi-frequency antenna measurements on a typical facility in anechoic chamber.A. V. KalininWe consider the results of using the multi–frequency method on acting serial facility for antenna measurements in anechoic chamber as for definition of sources and levels of scattered fields, as for measurement of the antenna characteristics with higher accuracy.

Using the wave guide effect of periodic knife-type structures for increasing the transparency of reinforced randomås of aerials.E. L. Kapylov, A. V. Kotljar, A. D. Frantsuzov, V. M. ShkilOn the basis of method of the generalized scattering matrixes and semi-inversion method the strict decision of a problem of diffraction of electromagnetic waves on the

element of metal-knife diffraction grating embedded dielectric random has been obtained. Frequency and incidence angular dependences of power transmission coefficient of various types of radomås have been investigated.

Mathematic modeling of microstrip radiators, based on the use of integral equations of first kind.V. V. Chebyshev, N. Y. Filatov, E. V. FilkovaMathematic modeling of microstrip radiators in a plane layered medium is discussed. It is based on the use of integral and integrodifference equations of first kind.For example, building of algorithms and numerical results for different topology of spiral radiators are given. These results are interest for building of wideband antenns for mobile communications.

Increase of accuracy of angular measurements in problems of the radar-ljcation atuse of ultra wide band signals.B. A. LagovskyAccuracy of measurement of angular coordinates of the purposes protected by absorbing coverings, increases due to a choice of optimum form of UWB signals. Optimization is carried out on the basis of known characteristics of the antenna system and the full or partial data on reflecting properties of the target. The offered algorithm allows receiving the maximum possible value of an accepted signal at the set width of pattern.

Theoretical and experimental researches of the characteristics of the final wave-guide phased antenna arrays.Yu. V. KotovIn the article the outcomes of theoretical calculations and experimental researches of the characteristics of series of the waveguide phased antenna arrays (PAA) consisting of waveguide units with the composite shape transverse section are considered. The computational and experimental directional diagrams (DD) are compared, the mutual coupling factors, reflection losses and side-lobe level (SLL) of final PAA from waveguides of arbitrary cross section working as on linear, and on circle polarizations of a radiated field are evaluated.

Investigation of the statistic characteristics of the atmospheric radio interferences in the long wave and the superlong wave bands in the european part of the Russia.Yu. K. SavinResults of the experimental investigations of the statistic characteristics of the atmospheric radio interferernces in the European part of Russia are presented. These results are the basis for calculation of the radio communication quality and reliability in the long wave (LW) and the super long wave (SLW) bands [10…150 kHz].

The three-dimensional mathematical field model of HF sky-waves. B. G. Batasbashov, M. M. Anishin, G. A. ZhbankovThe three-dimensional mathematical field model of HF sky-waves reflected by spatially non-uniform non-stationary magnetoactive ionosphere is described. The model is based on the structural physical approach which leads to complete understanding of the field structure in space and time associated with specific geomagnetic conditions.

"ANTENNAS", No. 8-9(87), 2004

CONTENTS

FROM EDITOR

REFLECTOR ANTENNAS

Multiple-reflector antennas.L. D. BakhrakhVarious multiple-reflector antenna schemes, design methods and application fields are considered.

Modeling of UWB parablic reflector antennas.L. D. Bakhrakh, I. F. Budagiyan, G. G. ShchuchkinThe solution of two-dimensional diffraction problems of electromagnetic waves on the parabolic reflector antennas with non-uniform impedance edges, which are realized via a tapered resistive film, is considered by method of the integral equation. The numerical dif-fraction analysis will be carried out in a different zone of UWB reflector antenna. Modeling results of the mirror non-uniform imped-ance antenna's characteristics, taking into account a real source function and a pulse shape, is considered.

ANTENNA ARRAYS AND RADIATORS

A horn antenna arrays theory. (Imbedding method).L. D. Bakhrakh, V. L. Kouznetsov, I. I. VizginaA new approach for a calculation problem of radiation of horn antenna arrays, based on using of imbedding method, is extended. The horn system is considered as a transition layer, matching the waveguide to the free space and specified by a matrix transparent coef-ficient. A separation as well as integral equations methods is used by derivation imbedding equations for the transparent coefficient.

Waveguide slotted antenna arrays.S. D. Kremenetskiy, V. F. Los?, A. N. ShamanovAn accurate models for computation of the electrical field distribution compound slots in a rectangular waveguide with nonzero wall thickness is presented. Pertinent theory is given also for the design of longitudinal slot antenna arrays.

Problems of active phased antenna array design for airborne and spaceborne radar control systems.A. P. Kurochkin, V. I. Andrianov, V. S. Verba, K. V. Kozlov, S. V. Kritskiy, V. V. Rykov, L. M. YakubenProblems of active phased antenna array design for radar of advanced airborne early warning radar control systems and multifunc-tional spaceborne radar Earth observation systems are considered.

Optivization of an amplitude distribution in APAA elleptical aperture.

S. V. Kritskiy, K. V. Kozlov, V. I. AndrianovThe problem of an amplitude distribution determination in APAA elliptical aperture with specified side lobe level and maximal effec-tive area on reception and transmission mode is considered. Also the discretization of an amplitude distribution in APAA transmis-sion mode with lossless power potential is studied.

Caipon super resolution algorithm in adaptive antenna array with non identical receiving.O. S. LitvinovThis article deals with signal processing theory in adaptive antenna array protected from desired signal suppression. In these investi-gation main idea consists of receiving tracts nonidentity accounting. In addition considered theory takes into account correlation re-ceived signals in adaptive antenna array. As a consequences considered theory may be useful for super resolution effects analysis in adaptive antenna array with nonidentity receiving tracts at correlated received signals. The super resolution power is estimated for various type of receiving tracts nonidentity concerning as symmetric and asymmetric tracts patterns, different own noise power and no equidistant antenna array receiving elements spacing.

Ultrawideband antenna elements for antenna arrays.V. F. Los`, A. N. ShamanovA short review of known types ultrawideband radiators and its basic characteristics is given. The original method of a dipole excita-tion is presented which allow radiating of a supershort pulse signals.

SIMULATION OF ANTENNA FIEDER SYSTEMS

Applied mathematical models for electrodynamics', radiophysics' … infocommunications' solutions. S. D. KremenetskiyThis is a short chronological review of the formation and development of methods of applied mathematical models to analyze physical proc-esses in problems of electrodynamics, radio physics, infocommunications, etc. Considered are such processes as modeling antenna, radio-physics and the propagation of digital signals in an external medium, their reception and processing, and passage through large infocommuni-cations networks - to illustrate the potential of applied mathematical models for the solution of practical tasks. Development of microwave feeder devices.B. V. SestroretskiyThe way development and search of new solution in microwave feeder devices technology in the institrte's antenna department is considered. ANTENNA RADOMES

Radiotransparent antenna radomes.V. A. Kaplun

The optimization of radiating system aperture field distribution for decrease of curved dielectric structure.Yu. A. Kolosov, F. E. LevkovThe algorithm for solving the problem of antenna array (usual and phased) aperture field distribution optimization for decrease of curved dielectric structure influence on

its directivity characteristics is developed. The array scanning is taking into account. The nu-merical results are presented.

OPTOELECTRONICS

Development of systems of information transmission, processing and storage.A. L. MikaelyanHistory of research and development of new scientific branches is considered. The most important results are noted. Among them: the idea of optical waveguide implementation and theory of grade-index lenses and waveguides, waveguide-ferrite systems, single-mode lasers, holographic memory system, holographiuc nanostructures providing the given directional pattern. A special role of A. A. Pistolkors, the author's teacher, in development of these new scientific branches in our country is emphasised.

PROJECTS

Synthetic aperture radar on a high-altitude unmanned dirigible.V. S.Verba, V. A. GandurinSynthetic aperture radar (SAR) design on a high-altitude dirigible is considered. The SAR established on such dirigible with inde-pendent power supply and unlimited durability is considered as the tool for supervision of conditions in frontier areas of the adjacent states. SAR performance in low resolution mapping mode, in high resolution mapping mode, in interferometric mapping mode and in MTI is determined. The antenna array configuration used in all SAR modes of operation is shown. Estimations of required accuracy of measurement of parameters of movement of the carrier the SAR and ways of its achievement are given.

Perspectives Use Analog Photonic in Radar Systems.L. D. Bakhrakh, D. F. Zaitsev

ANTENNA SYSTEM RADIOTELESCOPES

Pistolkors-Bakhrakh school of thought and radioastronomy.Yu. P. Ilyasov

"ANTENNAS", No. 7(86), 2004

CONTENTS

IEM "KVARZ" - Russian Leader in Radiomeasurements. A. M. Kudryavtsev.

The IEM "KVARZ" H-Masers ? Modern State and Perspectives of Development.N. À. Demidov, V. À. Logatchov.The specifications of H-masers (CH1-75A active maser and CH1-76 passive maser) developed by the IEM "KVARZ" in 2002 – 2004 are presented. The information

about new developments of active and passive H-masers of a new generation and the preliminary results of experimental investigations of the specifications are given.

0.02-78.33 GHz Frequency Synthesizer.Yu. I. Alekhin, V. S. Zimin, Yu. F. Zotov, A. M. Kudryavtsev, I. G. Malter, A. A. Orlov, O. P. Pavlovski.The solution of some measurement tasks requires signal sources covering wide frequency range. The article describes the G7-15 Frequency Synthesizer comprising the basic unit (the G7-14 Frequency Synthesizer) and four oscillator units JA7-92?JA7-95. The Synthesizer principle of operation, its design features and its specifications are given. The possibility of the range extension are considered.

S4-98 Spectrum Analyzer.A. M. Kudryavtsev, M. A. Nesterov, N. K. Vlasov, A. N. Vesnovski.The applications, principle of operation, composition, functions and specifications of the S4-98 Spectrum Analyzer are described.

Real-Time Measurement of Complex and Phase Spectra of Broadband Microwave Signals.V. I. Tverskoy, A. V. Chernogubov.The possibilities of real-time measurement of complex and phase spectra of broadband microwave signals with dispersion Fourier processors are considered. The construction feature of such devices is described, their achievable characteristics are determinated and the measurement errors of the appointed spectra are evaluated.

A Set of fiber Optic Measurement Modules for VXI Automatic System.V. N. Gavrilov, Yu. M. Grajznov, A V. Mahatov, I N. Molkov, N. P. Morozov, V. A. Timofeev, A. A.Chastov.The results of development, fabrication and testing of the set of fiber optic modules for test and diagnosis on the base of the VXI-bus are presented. The functional diagrams, principle of operation and the main specifications of the fiber optic modules is considered. The key module assemblies features are described. The examples of measurement tasks solved with the help of these modules are given.

Multifunctional Complicated Microwave Devices - Components of the Modern Radioelectronic Instrumentation.A. M. Schitov, R. K. Starodubrovsky, S. V. Pankov, A. M. Kudryavtsev, I. G. Malter, V. A. Shumilov, T. G. Vesnickaya, G. M. Beresneva, A. N. Gorbunov.Results of development of multifunctional complicated microwave devices with frequency conversion are presented. These multifunctional complicated microwave devices are new key components for construction of modern radioelectronic equipment in cm- and mm-wave ranges.

Compensating Structures of Coupled Lines for Broad-Band and Super Broad-Band Microstrip Directional Couplers.R. K. Starodubrovsky.Inductive-capacitive compensating elements along coupled microstrip lines are used to equalize even- and odd phase velocities. These elements are employed to create octave and multioctave 10; 12; 20 dB-directional couplers in frequency ranges 0.2-18 GHz.

Complex Design of Radiomeasurement Instruments from: Design to Production.A. S. Maslov, L. N. Gunin, I. V. Ivanova.The design technology of radiomeasurement instruments on the base of the complex system of the basic constructional solutions is proposed. The system comprises the design phase which is ended with development of constructional documentation (including shop drawings) using CAD systems.

Modern and Future Galvanochemical Processing Trends in Radiomeasurement Instrument Production.N. P. Polishuk, Yu. I. Naumov, V. V. Ikonnikov.Some problems of electrochemical processing in production of modern radiomeasurement instruments are considered and the main ways of their solution are defined.

"ANTENNAS", No. 6(85), 2004

CONTENTS

Computation of the phased array antennas by a combined technique.V. M. Gavrilov.The task of moving-conductor calculation of an input reflection factor of radiators of the infinite phased array antenna is considered at scanning in Å- and H-planes by a combined method. There are represented the results of calculation of dependences of reflection factor from a corner of phasing for the different configurations by the antenna array from plane waveguides.

The radiationg field by the electrical placed along the wedge.S. O. TarasenkoIn this paper the radiating pattern by the electrical element placed along the wedge is presented. This solving based on the method of the wedge waves. Possibility of the change the precession solving of the diffraction problem on a wedge by his asymptotic variant is discussed. The enquired equations are continuous and presented in closed shape. Numerical results are described too.

Simylation of a phased array antenna performances with help of a myltielement wave guide imitator.V. M. GavrilovUsing the matrix theory of antenna lattices, the substantiation of principles of simulation of the characteristics of phased antenna lat-tice is obtained at scanning with the help of the multielement waveguide simulator.

Approximate calculation of minimized log-periodic dipole antennas.A. F. Yakovlev, A. E. PyatnenkovThe simple formulas for calculation: geometrical parameters of minimized log-periodic dipole antennas for deriving necessory direc-tivity; directivity, using known geometrical parameters of minimized log-periodic dipole antenna, are preposed.

Numerical method of calculation of the characteristics of wave-guide radiators of arbitrary cross section in the final antenna to a grating.Yu. V. KotovThe algorithm of numerical calculation of wave-guide radiators with an arbitrary cross-section profile in the grating, phased by the an-tenna (PAA) with final number of radiators is considered. The algorithm bases on model of the wave-guide radiator in conditions of infinite periodic PAA in the supposition, that mutual coupling factors in infinite and there are enough of large final PAA are identical. Matching outcomes of calculation is conducted on the basis of offered algorithm and outcomes obtained by stringent electrodynamic methods and an experimental way.

Weights jitter phenomenon in adaptive antenna arrays.S. V. ZiminaIn this article the different methods for studying weight vector jitter in adaptive antenna arrays are considered. It is analyzed initial as-sumptions, employed the investigators at studying of weights jitter influence on statistical characteristics of antenna arrays, and the results, which are obtained in these assumptions. More details the methods of perturbations theory are considered, allow to find the statistical characteristics of adaptive antenna arrays for general case of nongaussian statistical dependence between input signal vector and weight vector. Outline the ways further development investigations of weight vector jitter influence on statistical character-istics of adaptive systems.

Multiport Branch-Guide couplers for contoured beam antennas.K. V. Kobrin, M. B. Manuilov, G. P. Sinyavsky.A new rigorous and efficient full wave approach to analysis of multiport branch-guide couplers for contoured beam antennas is pre-sented. Solution of the problem for 2N-port branch-guide couplers is based on Galerkin's method taking into account the edge condi-tion and generalized scattering matrix technique. Numerical results are in a good agreement with the theoretical and experimental data of other works. Some optimized multiport branch-guide couplers are considered.

Matrix method of problem solving of an electrodynamics about the joint of waveguides of arbitrary cross section.Kotov Ju. V.The matrix method of problem solving of an electrodynamics about the joint of waveguides with an arbitrary cross-section profile with reference to emanatings to systems - phased antenna arrays (outer problem) and waveguide arrangements of a very high frequency (internal problem) is considered. The frequency characteristics of resonator devices of a very high frequency constructed on waveguides a composite cross-section profile are submitted.

Account a complex waves in a diffraction wave guide problems.R. V. Budaragin, S. B. Raevskij, A. A. TitarenkoOn an example of the task about the junction of two two-layer circular shielded waveguides the problems of shaping of diffraction bases of the shielded directing structures described by self-conjugate electrodynamics operators are considered.

Scattered impulse response extraction of objects in ultra wideband radars.Yu. V. Kuznetsov.

The technique of a scattered impulse response extraction of objects in ultra wideband (UWB) radars is presented. According to the singularity expansion method the signal, scattered by the radar target, is divided on early-time and late-time reactions. Extraction of the impulse response from the whole signal without division into parts allows increasing accuracy of object parameters definition. The reduction of a rank of an ill-conditioned matrix is offered to implement in accordance with the spectral criterion. The developed tech-nique of impulse response extraction from the scattered signal of the object is presented on an example of definition of the impulse response of the rectangular patch antenna.

Optimization of the Shape of ultra wide band signals for a detection hardly noticeable targets and holding radar-tracking measuring. B. A. Lagovsky The distance of a detection of the targets with absorbing coatings is increased by means of a choice of optimum performances of ra-diation of a RADAR and shape of super short pulses on the basis of data on reflecting properties of the radar targets. The distance of a detection of the targets proof by absorbing coatings, increased by means of a choice of optimum shape of UWB signals at given restrictions by a breadth of directional pattern. The optimization will be carried out on the basis of complete or partial data on reflecting properties of the targets. The application optimum filters created for the known targets allows considerably in-crease a signal-to-noise ratio, and also to reduce a breadth effective directional pattern.

Perspective directed antennas for mobile complexes of radio observation and direction-finder.A. V. Ashikhmin, Yu. G. PasternakThe designs of some perspective directed antennas functioning on the upper frequencies of a decimeter range of waves, intended for application in mobile complexes of radio observation and direction-finder are circumscribed as single antenna devices and elements of antenna array.

Methodical basis for radio metering inside metal vacuum chambers.A. P. PlokhikhMethodical basis for making radio measurements inside metal vacuum chambers is presented in this article. Basic requirements to auxiliary equipment of such chambers are formulated and recommendations for their design are given. Several design options are presented, as well as results of test measurements using the model objects.

Object EMC-problems peculiarity.O. Yu. Perfilov.It is presents the object EMC-problems peculiarity. The object EMC-models are worked out. Possible interference mechanism are analysed. Modern analysis method for EMC are worked out. EMC systems peculiarity are present.

"ANTENNAS", No. 3(82), 2004

CONTENTS

From Editor

The Band and Directed Properties of Circular Polarization Antennas at Variation of Reflector Type.V. Yu. AronovIt is investigated the frequency properties of a radiation pattern, an input impedance and directivity factor of a duplexer antenna with the crossed dipoles at circular polarization. Results of calculations are given.

Electrostatic Models of the Dielectric Elements to the Antenna-Feeder Paths.I. V. BondarQuestions of the account the effect of the dielectric elements on parameters of antenna-feeder paths are considered. Two electrostatic models of the insulators allowing to take into account their presence at the decision of an electrostatic problem for the device as a whole are offered. The first model provides formalization boundary conditions on a boundary dielectric-air, second – on a boundary dielectricconductor.

Electrodynamic Model of Middle Wave Antenna Ground on the Basis of the Solution the Problem on Radiation of the Underground Elementary Dipole Received by the King - Smith Method.A. L. Buzov, A. M. Verevochnikov, and A. M. ElekhinProblems of construction the electrodynamic model of middle wave antenna ground on the basis of the solution a problem on radiation of the underground elementary dipole received by a method of King - Smith are observed. The derivation of expressions for kernels of the corresponding integrated equations system is given. Results of the solution of test problems are shown.

An Integral Equation Means Impedance Boundary Conditions for Low-Profile Antenna.A. L. Buzov and M. A. PetrovProblems of high-Q low-profile antennas by the integral equation means impedance boundary conditions are discussed.

The Second Kind Fredholm's Equation for Wire Structure at an Excitation which is not Being Axially Symmetric.M. A. BuzovaProblems of construction a second kind integral equation in the thin-wire approximation are considered in view of azimuth dependences of a field vectors.

The Calculation Method of the Wire Antenna Impedance on the Basis of the Energy Balance Equation.M. A. Buzova and V. V. YudinThe calculation method of a wire antenna impedance on basis of definition the energy flow over the cylindrical surface of wires is considered. It is shown, that thus convergence of a computational algorithm much improves.

About Updating the Broadcast Antennas MF and HF Ranges.A. M. Verevochnikov, A. V. Elekhin, and L. S. KazanskiiThe state-of-the-art condition of the broadcast networks antenna-feeder equipment is considered and ways of its perfection during updating networks of radio broadcasting

MF and HF ranges are scheduled.

About the Account of the Signal Spectrum Type at Probing the Out-Of-Band Performance of Antennas.M G. Vishnyakov and V. A. TimashkovProblems of the account of a interfering signal spectrum type at the analysis of antennas performance on the frequencies essentially distinguished from working are considered with a view of provision an electromagnetic compatibility.

Investigation the Ground Effect on Characteristics of the Elevated HF Loop Antenna.A. V. ElekhinCharacteristics of the omnidirectional loop antenna in the horizontal plane providing radiation the vertical polarized waves are researched. Investigation were carried out by a numerical electrodynamic method. Effect of real ground was taken into account by use of Sommerfeld's integrals. It is shown, that at optimum altitudes of a antenna hanger directivity factor essentially increases, and radiation patterns become more favorable in comparison with a case of antenna disposing in free space. Fields near to the antenna are probed from the point of view of electromagnetic safety.

Procedure of Technical Diagnostic and Monitoring of Antenna - Mast Constructions.S. N. Eliseev and S. V. YamschikovFundamental principles of a procedure the technical diagnostic and current monitoring of antenna - mast constructions are observed in connection with problems of redesign and evolution of antenna-feeder tele-radio broadcasting and a radio communication equipment. Results of approbation a procedure at diagnostic study of a tower the acting radio and television transmitting center are resulted.

About Necessity of the Account a Real Distribution Current in Antennas of LF, MF and HF Ranges at the Estimation Electromagnetic Safety.Yu. I. KolchuginThe analysis of methods to calculate an electromagnetic field strength near to antennas of LF, MF and HF ranges specified by methodical documents on electromagnetic safety is carried out. It is marked, that results of calculations have the approached character because of series of assumptions. On basis of numeric calculation shown that account of real current distribution lead to evident correction. For raise of accuracy of calculations the presence(finding) of real distribution of a current on emitters of antennas is offered by a method of the integrated equation.

Production and Adjustment Technology for Broadcasting and TV Antennas of VHF and UHF Bands.A. D. Krasilnikov and N. A. NosovProblems of technology for broadcasting and TV antennas of VHF and UHF bands are considered, in aspect of the adjustment. Main adjustment stages are adduced. A necessity of the stages is grounded.

Problem of Implementation and Synthesis of Matching Circuits for Band-Pass Antenna Systems.M. A. Minkin and A. V. Nevskii

The problem of the matching the band-pass antenna systems with feeder sections is analyzed. In interests of the further analysis the problem is broken into a series component, that allows to formulate a problem of physical implementation the corresponding matching circuits. The samples of calculation a matching circuits for antennas of multiprogramm television broadcasting with wattless components in structure of radiator are resulted.

Analytical Design of Antenna-Feeder Devices.N. A. NosovVarious aspects of analytical design the antenna-feeder devices are observed. The algorithm of design is offered and sample of his using are given.

Out-Of-Band Gain Characteristics Analysis for Circular Antenna Arrays of Sector-Shaped and Adaptive Patterns. V. A. TimashkovThe features of application of out-of-band gain estimation method for circular antenna arrays of sector-shaped patterns, including adaptive ones, are discussed. The results of calculations are adduced.

"ANTENNAS", No. 2(81), 2004

CONTENTS

Systems of scanning of the phased antenna arrays on the basis of analog photonics.L. D. Bahrah, D. F. ZaytcevThe basic methods of application of analog photonics in systems of scanning of the phased antenna arrays and the active phased antenna arrays are in-process considered. Singularities of construction of different versions of such systems are analysed. The version of complex application of different scanning method for the two-dimensional active phased antenna array is offered. Outcomes of the experiments verifying a capability of activity of switches of optical delay lines on fastresponse photodiodes with a high outcome in a superbroad band of operational frequencies are adduced. Recommendations on application of different versions of systems of scanning are given depending on frequency bands and executed tasks.

Optimization of parameters of a ring concentric antenna array with passive elements.A. V. Matorin, S. A. ZaikinWith use of a two-stage numerical optimisation method based on genetic algorithm the problem of parametrical synthesis of the ring concentric antenna array with passive elements is solved; is shown, that additional passive radiators provide improvement of its directed properties at circular scanning.

Scan Characteristics of Dome Lens Antennas.Yu. V. Medvedev and Yu. Ya. KharlanovThe analysis of performance conditions of dome dielectric hybrid-lens antennas (HLA) in mobile means of satellite and radio-relay communication in millimeter and centimeter wavebands is carried out. The approach to optimum design of antennas is offered. Numerical research results on relations of dome HLA gain with geometrical

sizes of lenses and parameters of their dielectric in wide scan sector are presented. A possibility of achievement of required scan characteristics is shown within the limits of hemisphere and more. For carrying out of research a mathematical model of HLA is used, which is based on geometrical optics Kirchhoff approximation.

Algorithm of synthesis of the onboard mirror antenna having radiation pattern of special shape.A. G. DavydovThe problem of construction of the antenna for basing on the space flying device which should provide constant density of a radiating energy within some part of a surface of the Earth is under investigation. The antenna includes a main mirror as surface of revolution and a corrugated conic horn. The algorithm of synthesis of the form of the mirror providing the required antenna's radiation pattern in working sector is offered. The example of realization of the antenna with concrete values of parameters is considered.

Characteristics and Potential Possibilities of Lens Antennas Based on a Homogeneous Dielectric Sphere.Yu. Ya. KharlanovInvestigations and optimization of characteristics of lens antennas on the basis of a homogeneous dielectric sphere are carried out in view of aberrational effects, reflections from lenses, losses in a dielectric, feed antenna pattern, matching layers and technological admissions. As criterion of optimization the maximal value of a gain of the antenna is accepted. The antenna characteristic dependences from the geometrical sizes and dielectric parameters are obtained. Extremely accessible the antenna characteristics are defined. The characteristics of antennas on the basis of the homogeneous sphere and Luneberg lens are compared. The estimation of influence of hydrometeors (water, ice) on antenna characteristics is carried out. In the investigations, we employ a mathematical model of the spherical lens antenna, which is based on the rigorous solution to the problem of electromagnetic wave diffraction from a multilayer lossy dielectric sphere excited by any amplitude-phase distribution of the field. Results of calculations of a gain and patterns of antennas are compared to experimental results.

Radiation Pattern of a Siot Radiator Located on the Perfectly Conducting Polyhedron.S. O. Tarasenko

Vector directivity patterns optimization of monopulse arrays withcommon sharing of beams.B. D. Manuilov, P. N. BashlyA method of vector directivity patterns optimization of amplitude summary-difference monopulse arrays with common beams sharing, based on extreme properties of a ratio of Hermitian forms, is offered. A stabilization problem of an equisignal direction of a monopulse array when gap sharing in the vector directivity pattern of a plane array of rectangular waveguides is analysed.

About vector spherical harmonics of circular polarizaton.B. L. KoganThe definition of vector spherical harmonics is given, at which one the tangent

components are expressed in basis of circular polarizations. It has enabled directly to apply known functions and associated facts from the theory of a representation of the rotations group. The multipole solutions of Maxwell equations are obtained on the given basis more simple in the explicit form, than usual. The circular polarization vector patterns have in this basis of one component, similarly to scalar functions.

Diffraction of a plane electromagnetic wave by a perfect conducting circular cylinder of finite length with accounting of a azimuthal component of a current.M. G. Kornev, V. A. NeganovThe problem of diffraction of a plane wave by a perfect conducting circular hollow cylinder of finite length with accounting of a current`s azimuthal component which nascent on the cylinder`s surface. The unknown vector function was presented as expansion in a Fourier- series of azimuthal harmonics. The system of one-dimensional singular integral equations (SIE) relatively azimuthal harmonics components of surface current was acquired. Systems singular integral equations relatively azimuthal harmonics components of surface current for hollow cylinder of finite length is generalization of prominent SIE for symmetrical oscillations of thin electric vibrator. This SIE for thin electric vibrator V.A. Neganov and I.V. Matveyev was acquired [4,5]. The influence of azimuthal component of surface current on distribution of surface current on cylinder. This method has fast internal convergence.

Electromagnetic field of a partially plunged electric vibrator in the two-layer space.Y. V. Pimenov, A. B. ProshinIn this paper was investigated electromagnetic field of a partially plunged electric vibrator in the two-layer space. The problem was reduced to the system of generalized integral equations Pocklington's type with Green's function of two-layer space. For obtained system was developed effective algorithm of numerical solution. With using this algorithm was computed electric field of vibrator both at first layer and at second layer.

The energy relationships for nonlinear electrodynamical scattering problems.G. A. Yerokhin, V. G. Kocherzhewski, E. V. SmirnovThe article represented an optical theorem for nonlinear electrodynamical scattering problems in the condition for monochromatic excitation. It is shown, that with the help of this theorem nonlinearity presence conduce to change total loss power and scattering power as well as to change relationship between they in different frequencies.

"ANTENNAS", No. 1(80), 2004

CONTENTS

New Industrial Measurement Signal of SHF and EHF Ranges.J. Alekhin, A. Kudryavtsev, O. Pavlovski, V. RastorguevThe article considers the state of series production of measuring signal generators of microwave and mm-wave ranges widely used for measurements of various radioequipment parameters. They consider this equipment and its applications. The

further development trends are considered.

High directivity coaxial multioctave couplersA. E. Lvov, S. V. Pankov, R. K. StarodubrovskiiUltra broadband coaxial couplers are presented. Diaphragmed coupled rectangular bars are used to realize multisection high directivity couplers up to 40 GHz. The basic configuration is discussed and presented.

The approximate analisis of nonlinear transformation of UHF signals in microstrip line with ferrite substrateV. A. KozlovThe approximate analisis of nonlinear reaction of microstrip line with ferrite substrate is cosidered. The investigations are based on using of Volterra functional serieses.

Wideband coaxial attenuatorsG. I. ShishkovThe operation principle and design of modern wideband coaxial attenuators are described. The main attenuator specifications are given.

Internal problems of diffraction in the directing structures described by non-self-conjugate operatorsA. S. RaevskiyThe spectrums of own waves of the guiding structures by described non-self-conjugate boundary problems, generally include waves with complex wave numbers - complex waves.

About methods of account of waveguides with a smooth-irregular shielding surfaceR. V. Budaragin A. A. RadionovThe most widespread methods of account of irregular waveguides with a shielded surface, smoothly changed along a longitudinal coordinate are considered. It is conducted the comparison of outcomes of account smooth transition in the round shielded waveguide obtained with the help of algorithms, developed because of considered methods. The advantages and defects of these methods are revealed and the recommendations for their use are given.

An approximate calculation method of the dispersion in fibre with the periodically variating refraction index along the axisS. B. Raevskiy, A. A. SmirnovAn approximate method is suggested for the symmetric H-wave characteristics of circular optical fibre which combines the Galerkin's method, the partial region method (PRM) as well as the iterative process. The numerical realization results are presented.

About a capacity flow density distribution in circular open lost-free ferrite wave guide cross sectionD. D. Vipritsky, A. V. NazarovThe analysis of the circular open longitudinal magnetized lost-free ferrite wave guide in the unlimited isotropic medium is carried out. Capacity flow density longitudinal component distribution in considered structure cross section for three waves with azimuth index equal one is researched.

Features of own waves multiplayer shielded circular waveguideV. A. Kalmyk, A. A. Titarenko, D. V. TyurinThe method of creating of dispersion equation for a multilayer circular waveguide is presented. On the basis of the solutions received, some special features of electromagnetic wave propagation in such waveguides are obtained. It's shown that complex waves of the high radial types can exist with small coefficients of filling. It's also shown that when a thin dielectric tube is introduced into the wavewguide, a dramatic rarefaction of dispersive curves of the slow waves can take place.

To the question about own mode specter of shielded microstrip line (SML)V. K. Maistrenko, A. A. Radionov, S. N. SvetlovIn the paper is considered the calculation method of dispersion characteristics in SML, which take into account «geometrical singularity» using a special function basis. It is shown, that this method allows to calculate total own mode specter, including own complex mode of SML.

Research of cylindrical metal-dielectric resonatorYu. G. Belov, N. A. PikhtelyovThe investigation of cylindrical cavity with dielectric plate is made by method of partial areas with using of continuous spectrum of own functions in one of partial areas. The values of resonant frequency and quality of symmetrical fluctuation are calculated. With reference to using of this cavity as a sensor of dew point's temperature in gas humidity's gauge the influence on resonators characteristics of liquid film, condensing on surface of dielectric plate, is analyzed.

Cylindrical oscillating system with dielectric resonators resonant frequencies calculationV.A. BajilovOn the basis of a method of partial areas the algorithm of rigorous calculation of a spectrum of resonant frequencies of the cylindrical shielded oscillatory system with dielectric resonators is developed. Axial-symmetric types of oscillations are considered.

Calculation of the generalized scattering matrices in the spherical system of coordinates and its application for the analysis of antennasN. I. KuzikovaIt is considered a method of solving of antenna analysis problems by means of the generalized scattering matrices formalism using spherical field harmonics. Main parameters of the two-element antenna system are calculated. Results of the direct numerical analysis are compared with the results, reached by means of the generalized scattering matrices, and confirm its validity.

"ANTENNAS", No. 9(76), 2003

CONTENTS

FROM EDITOR

Principles of Construction of Duplexer Antennas of the Mixed Polarization for Transceiving Systems of a Mobile Radio Communication.V.Y. Aronov, M.A. Minkin.Ways of construction the antennas with the mixed polarization for the transceiving stations of a mobile radiocommunication are probed. Possibilities of creation the unitized design for shaping various types of radiation pattern by installation of additional passive components are considered. Results of calculations are instanced.

Antenna Arrays of Scheme-space Maltiplexing as Alternative to the Sector Antennas Cellular Mobile Communication.A.L. Buzov.Prospects of use of antenna arrays of scheme-space multiplexing in systems of a cellular mobile radiocommunication are analysed. The brief characteristic to various methods of addition of signals is given. The expediency of use in a cellular transmission the scheme-space multiplexing, by implemented directional antenna arrays, including the adaptive is justified.

Estimation of Space-power Characteristics of Dipole Antennas on the Frewuencies Essentially Distinguished from Working.A.L. Buzov, V.A. Timashkov.The procedure of an estimation the characteristics of the antenna outside a working frequency band for a problem solving of provision an intersystem EMC is offered. Application of a procedure is illustrated on instances of the single dipole of vertical polarization and a linear antenna array. Results of calculations are instanced.

The Second Kind Fredholm Integral Equation, Means a Boundary Condition for a Magnetic Field, for the Lianer Vibrator.M.A. Buzova.The problem of application of the second kind Fredholm integral equations for the electrodynamics problems solution is considered. The conclusion of the 2-nd kind equation for an axial current of the vibrator is considered. The solution method for the received equation, and some of numerical results have found on it's basis are adduced. The comparison with the similar results received on the basis of 1-st kind the integral equation is carried out.

About Use of the Principle of Contracting Maps at Probing the Problem of Existence and Uniqueness the Solution of the Second Kind Integral Equations for Linear Dipoles.M.A. Buzova, V.V. Yudin.The problem of existence and uniqueness the solving of 2-nd kind Fredholm integral equation for linear dipoles on basis of principles of contracting maps is investigated. The demonstration of a sufficient condition for existence and uniqueness of a solution will be carried out in view of a concrete aspect of the equation kernels.

The Analysis of the Multwire Symmetrical-matching Links in Composition of Dipole Radiators by Method of an Integral Equation.I.V. Bondar, N.A. Nosov.Problems of the analysis of the multwire symmetrical-matching links on the basis of the decision of the corresponding cross electrostatic tasks by a method of an integral

equation are observed.

The Perspectives of the Developing Antennas of New Type for Synchronous Broadcasting Network in MW Band.A.M. Verevochnikov.Considered the possibility of application simple directional antennas for improvement of technic and economical effects during establishing organization of a network of synchronous broadcasting network in MW band.

Calculation Equations for Determination the Levels of the Electromagnetic Field Near to Antennas of Subscriber's Satellitle Terminals and Subscriber's Radiophones of the Cellular Communication.M.G. Vishnyakov, Y.I. Kolchugin.IIn paper electrodynamic models presented and calculation equation for determination the levels of the electromagnetic field established by antennas of subscriber's terminals of a satellite communication and radiophones of a cellular transmission are received.

Possibilities of Martempering of Quality of Supply VHF FM Radio Signal on Broadcasting Frequency Due to Application of an Additional Transmit Antenna.S.N. Eliseev.Possibilities of magnifying the gain of transmit antennas VHF FM broadcasting in a preset direction are probed, with the purpose of supply of a signal on a receiving station, due to application of an additional directional antenna, at conservation of a comprehensible level of a field in a service area.

Yagi Passive Repeaters for VHM FM Broadcasting.

The feasibilities of passive Yagi wave-retardant structures for VHF FM broadcasting in local shaded zones are esteemed.

The Account of Effect of Environmental Metalworks and the Underlaying Surface at Determination of Levels of the Electromagnetic Field on Passport Antennas Radiation Patterns.S.N. Eliseev.IIn paper the method of calculation the electromagnetic field levels, radiated by antennas VHF and UHF ranges, by passport radiation patterns with account of effect of environmental metalworks and underlaying surface is considered. Criteria of the account of the pointed factors are developed. Necessary equations are received.

The Ways of Creating Effective Antennas for Digital Broadcasting in MF and HF Bands.A.V. Elekhin.The opportunities of the creation of effective small-sized aerials for vertically polarized radiation for a digital broadcasting by a terrestrial and spatial wave are consided.

Space and Impedance Characteristics of Antennas for Multiprogramme TV Broadcasting with Reactive Components Composition of Radiators.A.D. Krasilnikov, A.V. Nevsky.

Opportunities of application in composition of radiators of dipole antennas the reactive (in particular, capacitor) elements are observed. The calculated space and impedance characteristics of radiators in IV and V TV ranges with an estimation of band properties with reference to an analog and digital terrestrial TV broadcasting are given.

The Out-of-band Characteristics the Gain of Antennas Mobile Radio Communication.V.A. Timashkov.The algorithm and the results of analysis the space and impedance characteristics of base station antennas of a mobile radiocommunication on the frequencies essentially distinguished from working are instanced. On an instance of a collinear antenna and a Yagi antennas the order of determination of controlled frequencies and directions is shown. Results of calculations the characteristics of the out-of-band gain are instanced.

Surface Antenna Pattern Based on Impedance Cylinder of Arbitrary Cross Section.D.D. Gabriel'ian, M.Yu. Zvezdina, O.S. Labunko.The problem of a radiation of a surface antenna based on impedance cylinder of arbitrary cross section is investigated. The effect of surface impedance on singularities of excited electromagnetic field structure in far zone is analyzed. The results of numerical investigations are presented.

"ANTENNAS", No. 6(73), 2003

CONTENTS

FROM EDITOR

Numerical Simulation Results of Microstrip-Stubs Reflectarrays Investigations.A.O. Kasyanov, V.A. ObukhovetsThe numerical research results of scattering characteristics of a microstrip–stubs reflectarrays, which have obtained due to a mathematical model, developed by the authors, are represented. The mathematical model of a reflectarray allows introducing into a construction of each microstrip element some shunts with controllable loads. It is shown, that due to shunts it is possible to control amplitude and phase of a scattering fields.

Synthesis of Anizotropic Impedance Plane.Yu.V. Yukhanov The problem of synthesis of anizotropic impedance plane reflecting a plane uniform wave in a given direction at the desired polarization is solved. The distribution of the impedance is expressed analytically and constitutes a periodic structure. The restrictions on the class of the allowable scattering patterns are formulated for the reactive values of impedance. The reflection coefficients of the nonuniform anisotropic impedance plane are obtained. Numerical results are demonstrated.

Cassegrain Reflector Antenna Based on Printed Elements Reflectarrays.A.O.KasyanovThe problems of constructive synthesis of Cassegrain reflector antenna as integral circuit are considered. On a comparison with known constructions of such antennas the offered antenna has a series of advantages, namely, greater adaptability to manufacture of printed elements reflectarrays and more high level of a transparency of a polarizing filter due to introducing in antenna construction of a «clarifying» grating.

Modelling of the Screens with the Controlled Transperency at Microwaves.V.N. Kissel, A.I. Fedorenko, N.N. KisselThe general common principles of construction controlled SD, including availability in each channel of devices of maintenance of demanded impedance ratio, coordination both control of a phase and modules of transmission factors and reflection, definition of minimum quantity of members and values of their parameters are designed (elaborated) at desired laws of change peak(amplitude) and phase characteristics of investigated(studied) multiterminal networks.

Radioimpulse Excitation of Layered Environment.V.V. ChechetkaProblem of excitation of layered of environment radioimpulse, created vertical electrical vibrator is considered. Accounts of the form bending around radiosignal in a point of supervision are executed at reflections by a similar layer on an impedance plane.

Electromagnetic Waves Scattering by Complex Shape Microstrip Reflectors.A.M. Lerer, G.P. Sinyavsky, D.E. ZelenchukA numerical-analytical approach for solving problem of diffraction of electromagnetic wave by 2D array of complex shape microstrip reflectors has been proposed. Vectorial integral equation for the problem have been solved by Galerkin's method. A projecting basis that takes into account edge condition for current of a complex shape reflector has been suggested. A computer program for analysis of microstrip antenna arrays has been worked out.

The Experimental Research of the Rod Antenna Input Impedance.S.S. Garmatyuk, V.G. SharvankoThe rod antenna input impedance meter with the help of a Q-meter modified method is described. A comparison of the experimental and well-known input impedance calculation dependences according to the electrical dimensions of a vibrator and a counterbalance is given. At 105 MHz frequency the dependence of input impedance on the vibrator length, the counterbalance area, the presence of a man's body and metal plate near the antenna is studied.

The Estimation of Manufacturing Mistakes Influence to Pattern of GSM Base Station System Antenna.A.I. Panychev, B.V. TishchenkoThe non-directional at horizontal planes antenna representing a cylindrical reflector with vertical half-wave vibrators in regular intervals distributed on an azimuth is considered. The character of antenna radiation in a horizontal plane is estimated by value of uniformity factor. The influence of reflector structure manufacturing

discrepancy and mistakes in emitter's installation at radial and azimuth coordinates on uniformity factor is investigated by interval method. The statistical estimation of polar pattern distortion is carried out for a case uniform and normal distributions of the random antenna geometrical parameters.

Invariant Properties of Anizotropic Impedance Z-Coverings and Impedance Models of Black Bodies.A.I. SemenikhinProperties and possibilities of the planar and cylindrical coverings characterizing by diagonal impedance tensor with unit determinant are considered. Invariant properties (relatively of angles of incidence and observation angles, impedance of covering, contours of cylinder) of secondary fields are found. By integrated equations' method impedance model of cylindrical to the McDonald's black body is determined. Examples of control of invisible wave scattering are given.

Broadband Direction Finder with the Scanning Antenna Pattern.A.P. Dyatlov, P.A. Dyatlov, B.H. KulbikayanPrinciples of construction and the basic characteristics of a broadband direction finder with the scanning directional diagram of the aerial in modes of search, detection and classification of signals with pseudo-casual reorganization of working frequency are investigated.

Influence of Local Reflection Coefficient Changes on Statistical Characteristics BackScattered Electromagnetic Field Under Conditions of Restricted Spatial Spacing Between Irradiation and Reception Points.V.T. LobatchThe reflection of electromagnetic waves the two-scale statistical rough surface for small spatial spacing between the points of irradiation and reception is investigated. The statistical characteristics of the complex amplitudes for major polarization of reflected fields are analyzed.

The Reflecting Surface Profile Evaluation Inaccuracy Influence on the Adaptive Antenna Array Noise-Immunity.V.P. FedosovThe analysis results of the reflecting surfaces profile inaccuracy measurement influence on the adaptive antenna array noiseimmunity are given.

"ANTENNAS", No. 5(72), 2003

CONTENTS

Super Broadband Fiber-optical Network of a Microwave of Signals and Super Short Pulses.L.D. Bahrah, D.F. Zaytcev The general common principles of construction controlled SD, including availability in each channel of devices of maintenance of demanded impedance ratio, coordination both control of a phase and modules of transmission factors and reflection, definition of minimum quantity of members and values of their parameters are designed

(elaborated) at desired laws of change peak(amplitude) and phase characteristics of investigated(studied) multiterminal networks.

Direction Characteristics of Active PAA at Various Amplitude Distributions and at Failures of Active Modules.A.V. GostuykhinDirectional characteristics ÀPÀA at failures of active modules and various amplitude distributions on aperture are considered. Results of calculation of antenna patterns and relative value of directivity factor of APAA presented both at failures of active modules, and at amplitude-phase compensation of these failures.

The Radar Targets with the Help of Super Short Pulses.B.A. LagovskyThe distance of a detection of the targets with absorbing coatings, is increased by means of a choice of optimum performances of radiation of a RADAR and shape of super short pulses on the basis of data on reflecting properties of the radar targets.

EMC Problems of Airborne Radio Engineering Complexes.L.D. Bahrah, L.M. TimofeevThe problems of EMC providing of radioelectronic means, which are included in a sophisticated radio engineering complex are considered. The difficulties, occurring at combining of separate components of the complex are examined. The analysis of the methods, with the help of which it is possible to solve the originating problem questions is briefly conducted.

Horn Antenna – type Radiator.E.G. ZelkinMain peculiaritives and characteristics of horn antennas are considered in the survay.

Application Photonic in Active Phase Array Antennas (APAA).D.F. Zaytcev The features of application photonic and, first of all, analog photonic as new direction in development of the equipment APAA for reception of qualitatively new opportunities, including due to practical realization of work of radars in a super wide strip with super short pulses are described. It is marked, that the equipment created on the basis of analog photonic has a plenty of advantages in comparison with the electronic equipment of similar purpose. The most evident examples of application analog photonic in development of last years are resulted.

The Properties of the Radiotransparent Windows on the Basis of the Complex Cross-Section Waveguildes.Yu.N. Vasilenko, A.S. Ilinsky, Yu.Ya. KharlanovThe possibility of the improvement of the radiotransparent waveguide window properties using the waveguides with the complex cross-section is considered. The numerical investigations and the comparative analysis of the window aperture efficiency factors on the basis of various types of the waveguides in a wide frequency band are carried out.

Non-symmetric Coaxial Log-periodic Antenna.A.F. Yakovlev, A.E. Pyatnenkov

Design of a directional non-symmetric coaxial log-periodic antenna (NCLPA) is given. Results of experimental investigation of electrical characteristic of NCLPA in frequency independent range and more low frequencies are presented. It is shown that good matching of the NCLPA with the feeder the lower limit of frequency independent operational mode allows to widen the frequency range of a rotable HF NCLPA.

Integral Equations of the Vibrator Antennas and the Calculation Methods.S.I. EminovIn this paper the survey of the equations of the vibrator antennas and the procedures of the equation solving is given.

The Maximum Channel Capasity of Multipath Wireless Channel with Potential Antennas.I.P. KovalevIn this article the maximum specific (per 1 Hertz of bandwidth) channel capacity of multipath wireless channel with given spherical receiving region is calculated. It is assumed that hypothetical potential antenna can extract all information from electromagnetic field in the receiving region. The representation of electromagnetic field as a sum of the fields of spherical harmonics is used for calculation. A wireless channel can be represented as a matrix that determines the transformation of the comprehensive amplitudes of sources of plane waves into amplitudes of spherical harmonics. The analysis of matrix channel is carried out for calculation of limit channel capacity. The results of numerical analysis illustrate the possibility of achieving high transmission speed for communication systems with Space Division Multiply Access (SDMA). It was shown that it is not necessary to have big diversity of the signal sources to achieve this speed. It is possible to build portable antennas with more than 2 space subchannels.

The Sorting Search of the Complex Waves in a Guiding Electrodynamical Structures.I.E. Britov, A.S. Paevskiy, S.B. RaevskiyA technique is development for the sorting search solutions of a dispersion equation waves of the guiding structures, descripting by a nonselfadjoint electrodynamical operators. The results, illustrating of a use this procedure, is presented.

"ANTENNAS", No.3-4(70-71), 2003

CONTENTS

Synthesis of Ring Concentric Array Antennas.D.I. Voskresensky, E.V. Ovchinnikova This paper presents algorithms of radiation pattern synthesis for ring concentric array antennas with a given side lobe level.

Behaviors of the Cylindrical Phased Antenna Lattice.Tong Xuan DaiThe formation of an antenna lattice, as a broadband antenna, whose oscillators are

arranged unconventionally, is considered. The computational characteristics of such a lattice in the presence of two-dimensional scanning and their dependence on frequency are produced. The comparison of these characteristics with those of a flat antenna lattice is made.

Correction of Characteristics of Directivity of Active PAA at Failures of Active Modules.A.V. Gostuykhin, V.N. TrusovThe method of compensation of failures of active modules APAA is considered. The technique is investigated and mathematical modeling recovery of directional characteristics is carried out at multiple failures of active modules. Results of numerical calculation of antenna pattern and a root-mean-square level of side lobes presented at amplitude-phase compensation of failures of radiators.

Antenna Patterns of Scanning Antenna arrays excited by Supper Short Pulses with Jitter.L.D. Bahrah, O.S. LitvinovThis paper is concerned with investigations of the performance of phased antenna arrays excited by super short pulses having non ideal rectangular form as a function of the time. In many practical situations, the exiting pulses have amplitudes decreasing with the period compared to the pulse duration. Such pulses form distortion called "jitter". The pulse jitter nature is based upon the peculiarities of the pulse forming process in the generating devices. In this paper the pick and average phased array patterns corresponding to antenna elements excitation by pulses with and without jitter having various duration, amplitude and oscillation period are compared.

Features of Reflection of Short Pulses by Radio Absorbing Coatings.B.A. Lagovsky, D.I. MirovitskyThe necessity of the account of phase dependences of factor of reflection is reasonable at designing broadband radio absorbing coatings for protection from short pulses. The features of reflection of symmetric and asymmetrical pulses are described. The technique of a choice of optimum phase dependences of factor of reflection is offered.

Antennas on Metallic Body of Revolution with Thin Walls.V.A. Voloshin, V.A. Voloshina, O.V. OvodovAlgorithm of using the auxiliary sources method for evaluation the radiation pattern of thin-metallic-wall antenna are presented. Results of testing and calculating examples of the antennas in a revolution body form are described.

The Radio Wave Direction Estimating on Base the Aperture Synthesis of Conform Antenna Diagram.V.N ShevchenkoThe problem of direction radio waves estimating has been solved as an optimization problem of the least squares. It has been shown that solution is reduce to determination of global maximum of complex antenna pattern real part. The computationally effective method of global maximum searching for two angles has been elaborated.

New Iterative Algorithms for Solving the Mixed Problem of Antenna Synthesis.

E.G. Zelkin, V.F. Kravchenko, and M.A. BasarabNew numerical algorithms for approximate solving mixed antenna synthesis problems with pre-given pattern and current amplitudes are proposed.

Diffraction Effects in the Leaky Waves Antennas.A.P. Yevdokymov, V.V. KrizhanovskyAn electrodynamic structure is investigated, consisting of a dielectric waveguide and a diffraction grating. This structure serves as a base for a number of leaky wave antennas. Specific diffraction effects are described and systematized, arising on the stage of near field transforming into the radiation pattern. The key moment is an electromagnetic wave passing trough the lateral surface of the dielectric waveguide. Refraction, scattering and reflection effects of the dielectric waveguide profile are investigated, leading to significant changes in radiation pattern. Practical recommendations are formulated for leaky wave antenna design.

Research of Phase Instability in Multichannel Fiber Optic System of Phase Array Radar Microwave Signals Links.D.F. Zayitcev, D.I. MirovitckiyThe algorithm of increasing the beam-rider guidance accuracy of a linear digital phased array, based on control errors of precise phase rounding up to the discrete of phasing is described. Analysis of beam–rider guidance accuracy, side lobe level of radiation pattern, and directive gain is carried out.

Results of an Experimental Research of Elements of Multichannel Fiber Optic Phase Stable Links of Phase Array Radar Microwave Signals.D.F. Zaitsev, D.I. MirovitckiyIn this paper the results of an experimental research of elements of multichannel fiber optic links for phase stable transmission of a microwave signals are given and the basic results of measurements of eight channel breadboard model of phase stable transmission of meter range signal executed on the "Center-FOSIT" automated stand in the range of temperatures +5…+45°C are submitted. The diagrams of elements and channels distributions of breadboard parts instabilities and general contribution of each part to instability of system are submitted.

Using the Complex Radiator in Antenna Array with Asymmetrical Sector of Scanning.S.O. TarasenkoAn antenna array may have the asymmetrical sector of scanning. In this case, the radiator with asymmetrical pattern may be used. In this paper, the construction of radiator with asymmetric pattern is described. Numerical results of its using in an array are also described.

The Phased Antenna Array on HF Comparators in Geophysical Gaging Complexes of Remote Sensing.Y. OpalenovThe results of experimental researches of a micropower receiving-transmitting HF of the modulus working in a quasicontinuous condition with PSK a cue, having a porosity 2 are considered. Statistical characteristics of signal responsibility, noise immunity, and phase selectivity of a parametric quantizer of a phase (PQP) of the HF modulus are presented independently and for a complex of remote sensing.

Effect of the Impedance Surface of a Circular Cylinder on Current Distribution of an Longitudinal Electric Dipole.M.Yu. ZvezdinaThe possibility of reduction of spectrum Green's function singularity order for calculating the mutual coupling of longitudinal electric dipole is considered. The dipoles are situated near the impedance circular cylinder. Current distribution is approximated by the system of general modes. The effect of the surface impedance of a circular cylinder on current distribution and input resistance is investigated.

Multifunction Antenna System.A.A. GolovkovThe principles of construction of new types of antennas providing the majority of functions of basic sites of reception transmitting stations and consisting of ordinary antenna of a required range and managing controlled multiports are described. In a general form, the basic tasks of synthesis and analysis of multiports are formulated, some concrete problems are solved. The basic rules of the developed theory, following from the decisions of formulated tasks, are resulted, which underlie constructions and principles of operation of offered antennas.

"ANTENNAS", No. 2(69), 2003

CONTENTS

FROM EDITOR

Focusizing of the Ultra-Short-Pulsed Radiation of the Aperture Aerial Zoning of the Aperture.Avdeev V. B. and Avdeeva D. V.On the basis of the use of the concept of pulse Fresnel's zones the opportunity of zoning of the aperture of the aerial for focusizing the ultra-short-pulsed radiation on the large distances from the aerial is proved. The estimations of achievable factors of focusizing are resulted.

Waveguide Filter Influence on Scattering Properties of Horn Antenna in Superbroad Frequency Range. Experimental Estimation.Belyaev V. V., Didkovskii L. V., and Kirianov O. E.The influence of the waveguide filter, based on the composite gyromagnetic materials, on the scattering properties of the horn antenna in the frequency range 2…18 GHz is experimentally investigated with the use of the pulsed radar complex.

Reciprocity Principle of the Directional Patterns of Multimode Antenna in Receive and Transmit Conditions.Vlasov V. I. and Nechaev Yu. B.Expressions for evaluating patterns of multimode aperture antennas in the "receipt?radiation" regime and obtained under the Kirchoff approximation. The conditions of coincidence integral expressions is determined. Experiments described in the paper confirm the theoretical consideration.

Investigation of the Surface Antenna Mode Phase Disagreement Influence on Radiation Characteristics.Vlasov V. I. and Nechaev Yu. B.Considering the approximate form of the Kirchhoff diffraction theory and using the electric, magnetic vector-potentials the expression for a far-field pattern of the multimode aperture antenna get excited equivalent coupled surface currents is obtained taking into account the dependence between propagation direction and allocation phase in the antenna aperture. Analysis of the ratio far-field radiation at Brillouin's angular directions with respect to mode's phase changes confirmed that the vector presentation allocation phase in the integral operator has peculiarity of far-field pattern as far as scalar representation generalizes invariant to phase changes expressions having nothing in practice.

Multichannel Adaptive Antenna System with Improved Noise Immunity.Kostrov N. A. and Valikov A. A. Problems of designing of adaptive antenna system on the base of ferromagnetic antenna elements with diagram controlled in the azimuth plane have been discussed. Advantages of antenna array including possibility of operative zeroes installation of directivity diagram to the disturbance from non-basic directions are shown. Polarization effects produced by multirayes spreading may be corrected by using the additional channel of waves falling under big angle.

Optimization of Structure of Small-Number Antenna Array for Widerange Correlative-interferometric Radio Direction Finder.Vinogradov A. D. and Litvinov G. V.The optimization of a double-ring antenna array construction for a correlative-interferometric radio direction finder are conducted. The maximum sidelobes level of a synthesized radiation pattern in a wide frequency range for the minimal number of antenna elements was used as an optimization parameter. Results of modeling of radiation patterns for radio direction finders using double-ring antenna arrays with six of antenna elements re presented.

Iterative Modification of the Induced EMF Method for Decreasing Errors of Bearing Measured by Ring Anttena Arrays with a Small Number of Elements.Ivanov A. V., Merkulov K. B., Ostankov A. V., Pasternak Yu. G., and Yudin V. I.The possibility of error reduction of bearing when using the modified induced EMF method was investigated and the essential differences of directional patterns and bearings obtained by the methods of modified induced EMF and induced EMF are analyzed.

The Experimental Method for Calculation of the Amplitude and Phase Radiation Field's Parameters of Radar Measuring Complexes.Kirianov O. E., Martynov N. A., and Ponkin V. A.The method of control of amplitude-phase distribution of a radiating field of the antennas of radar-tracking measuring systems based on the measurement of the back scattering diagrams of the test system of scatters in the radiating field of an antenna, the polynomial approximation of the researching field and the minimization of deviations between the measured and calculated diagrams. The results of mathematical simulation of restoring the radiating field are presented.

Investigation of Radio Wave Diffraction by a Horn Antenna with "Media-Dielectric-Metal" Junction for Purpose of Providing Electromagnetic Compatibility of Radioelectronic Devices.Belyaev V. V., Mayunov A. T., and Razin'kov S. N.The diffraction of electromagnetic waves by a horn antenna having "metal-dielectric-metal" junction with nonlinear volt-ampere characteristic on harmonics of a falling electromagnetic wave was investigated. The influence of non-premediate electromagnetic interferences due to field dissipation of the antenna system with nonlinear contact on its electromagnetic compatibility was estimated. The proposals for the elimination of secondary field radiation on harmonics were formulated.

Method for Improving Voltage Breakdown restriction Efficiency in Antenna-Feeder-Channels with Gap-Arrestors.Grishchyuk V. I., Grishchyuk Ya. V., Gerasimenko L. B., and Dubrovskii I. P.By using the model of a nonsynchronous excitation of the antenna aperture, the expressions are obtained for new energetic characteristics permitting to determine correctly the energetic efficiency of the transfer-reception process for super wide band signals in communication and radar radio channels with aperture antennas.

Modeling Gap-Arrestor's in Problems of Estimation of Lightning Protection of Antenna-feeder Devices.Grishchyuk V. I., Grishchyuk Ya. V., and Gerasimenko L. B.The model of a gap-arrestor is offered. The basic processes of a voltage breakdown in gases are reflected in this model. This model allows to estimate lightning protection of equipment in PSPICE software.

Synthesis and Analysis Almost Without Loss of Mutual Single-Wavelength and Two-Frequency Summators and Power Dividers with the Controlled Characteristics. Part 1: Impedance and Power Engineering Correlations. Part 2: Control Devices.Golovkov A. A. and Kovalev S. V.The formulate common principles of construction controlled SD, including availability in each channel of devices of maintenance of demanded impedance ratio, coordination both control of a phase and modules of transmission factors and reflection, definition of minimum quantity of members and values of their parameters are designed at desired laws of change peak and phase characteristics of investigated multiterminal networks. The general common principles of construction controlled SD, including availability in each channel of devices of maintenance of demanded impedance ratio, coordination both control of a phase and modules of transmission factors and reflection, definition of minimum quantity of members and values of their parameters are designed (elaborated) at desired laws of change peak(amplitude) and phase characteristics of investigated(studied) multiterminal networks.

"ANTENNAS", No. 1(68), 2003

CONTENTS

From Editor

The Multi-Frequency Multi-Port Antennas for Mobile Communications.The principal methods to design the multi-frequency multi-port antenna-feeder devices for mobile communications, used by leading foreign and native manufacturers of antenna equipment, are considered.

The Modern Methods of Electrodynamic Analysis of Wire Antennas. Problems, Solving, Delusions.Buzov A. L., Yudin V. V.The principal tendencies of modern stage of developing the methods of electrodynamic analysis are considered. The comparative characteristic is given and the perspective of different methods are evaluated, and principal problems are analyzed.

The Differences of Basis Metrological Performances of Antennas Attached to Certification Tests in Factory and Real Placement Conditions. (Writing in Order of Discussion).Buzov A. L., Eliseev S. N., Kolchugin Yu. I.On concrete examples, the necessity of account of specificity of placement of antennas attached to carry out certification tests in real placement conditions and algorithm of solving the task are shown. A corresponding change of the order of carrying out the certification tests is suggested.

The Electrodynamic Analysis of Radiating Systems By Using the Functions of Charge Distribution.Buzova M. A., Yudin V. V.The method for solving of external electrodynamics tasks by using the functions of charge distribution in the capacity of unknown quantities is suggested. The problems of realization of the methods of analysis of thin-wire systems and systems including the solid metal surfaces are considered. The perspective of this method is grounded.

The Technology of Tuning the VHF and UHF Dipole Radiators on the Basis of a Calculative-Experimental Method.Bondar I. V., Pavlov A. V.The technology of tuning the dipole radiators on the basis of a calculative-experimental method for defining the performance of input dipole circuits and it input impedance is considered.

Low-Profile Antennas for Mobile Radiostations.Gutgartz A. V., Minkin M. A. The variants of the design of low-profile antennas for mobile radiostations, placed on an isolated plane ground of finite sizes, are considered. The results of calculations of basis antenna characteristics are given.

On the Problem of Selection of Antennas For Synchronous Broadcasting on a Middle Frequencies.Kazansky L. S.The possibilities of reducing antenna sizes for lowering costs of synchronous broadcasting nets are considered.

Dual-Frequency Antennas for VHF Radiobroadcasting.Krasilnikov A. D.The dual-frequency antennas for VHF radiobroadcasting with different polarization of radiation are considered. The description of antenna constructions and calculated radiation patterns for three designing variants are given.

Multi-Port Antenna-Feeder Devices for Radiobroadcasting.Krasilnikov A. D., Nosov N. A.A variants of designing the multi-port antenna-feeder devices for radiobroadcasting on the basis of antenna arrays and radiation pattern building circuits in the form of Bathler's arrays 4?4 are considered.

The Basis Model for Research of the Radiation Properties for Some HF Band Antenna Types with Account of Fracture of Underlying Surface with Finite Conductivity.Kubanov V. P.The influence of fractures of an underlying surface with finite conductivity on forming the radiation performances of an elementary electrical dipole is considered. The solution of a bivariate task of diffraction of the plane wave in a wedge-shaped field with non-ideal conductive border in combination with the mutuality theorem are used in the capasity of investigation methods. The model is basic for learning radiation performances for more complex constructions of HF antennas with horizontal polarization of radiated field with account of fractures of the real underlying surface.

Diffraction of the Electromagnetic Field of a Rectangular Aperture by the Interface with the Semiconducting Medium Located in the Zone of Induction.Maslov M. Yu., Spodobaev Yu. M.The technique of electrodynamic modeling of the aperture antennas located near the interface with the semiconducting medium is considered. Results of calculation of fields in both media are presented, and thermal effects in the second medium are estimated.

The Antennas for TV Broadcasting, Optimized on a Parametrical Sensitivity and Tolerances on Executive Sizes Assembly Complects Component Parts.Minkin M. A., Nosov N. A.The method of choosing the variant of the space structure of antenna for TV broadcasting, including optimization on a parametrical sensitivity and tolerances on a sizes, defining the placement and orientation of radiators, is grounded. The results for antennas on panel radiators, optimized on a parametrical sensitivity and technological tolerances, both for their attached to radial and tangential orientation are given.

A Specificity of Analysis of Near Fields of Antenna Arrays with a Tangential Orientation of Radiators.Filippov D. V.The problems of specificity of analyzing near fields of antenna arrays with a tangential orientation of radiators are considered. Samples of calculation of the levels of electromagnetic fields radiated by an antenna array placed on a standard support are given.

The Generalization of the Model and a Method of Analysis for the Antenna-Feeder System within the Problem of Providing the Interplant EMC.Sevostianov S. V.The problems of generalization of the electrodynamic model and a method of analysis for the antenna-feeder system for providing the EMC on a system of an arbitrary number of antennas with arbitrary types of polarization are considered.