SCIENTIFIC CENTER OF APPLIED ELECTRODYNAMICS Areas of Activities: UHF Antennas and Equipment UWB...

SCIENTIFIC CENTER OF APPLIED ELECTRODYNAMICS

Areas of Activities:

UHF Antennas and Equipment UWB Digital Signal Processing

Adaptive SystemsElectromagnetic Compatibility

190103, Russian Federation, Saint-Petersburg, Rizhskiy prospect 28Phone: +7 (812) 324-25-87, Fax: +7 (812) 324-25-87

E-mail: [email protected], http://www.scaegroup.com

mailto:[email protected]


UHF Antennas and EquipmentDesign and manufacture of measuring complexes with decimeter, centimeter, millimeter and micrometer range antennas. Creating of land, sea, air and space based antennas. Reflector antennas, phased arrays and deployed antennas.


UHF Antennas and Equipment

UHF complex for detecting direction to RF signal sources. 8 sectors give a high accuracy detection.

Features Operating range 100MHz – 1GHzBearing accuracy 1,5-2 degrees

Solutions Small size diameter 64cm

height 32cmLow noise level less -130dBm


UHF Antennas and Equipment

UHF complex with Phased antenna. Narrow diagram allow a high accuracy detection of a source.

Features Operating range L,S-BandBeamwidth in the azimuth plane 3 degrees in the plane of elevation 20 degrees

Solutions Composite phased arrayAzimuthal supporting-turning device with the elimination of backslash


UHF Antennas and EquipmentWe conduct a set of measures of antenna parameters:

• Electrodynamic modeling of large antenna systems• Model of the stress-strain state of the construction• Simulation of temperature fields the thermal deformations• A complete analysis of the geodesic geometry of the component parts of antennas


Adaptive systems

Millimetron (realized) – orbital radio-telescope with adaptive main mirror. 96 slices, controlled by close-loop NI controller and moved by nano-positioners (Attocube Systems,Munich), working at cryo- temperatures, will give a perfect resolution in cosmic conditions.


Adaptive systemsCreating a system of measurement of deformations and adaptive reflective surface for the telescope of millimeter waveband with a mirror diameter of 70m RT-70, which is a part of building observatory at Suffa plateau (Uzbekistan).

The observatory at Suffa plateau, model and construction activity


Adaptive systems

Main design and operation characteristics of prototype and RT-70

Prototype RT-70

Installation type azimuthal-elevation

Mirror system Gregory system

Primary mirror diameter 70m

Counter reflector diameter 7m 3m

Rotation angles: by azimuth by elevation

±270from 4 30’ to 95 30’

Speed of rotation: by azimuth by elevation

from 2,5”/s to 30’/sfrom 2,5”/s to 15’/s

Sea level height 0 2500m

Seismicity - 8 point


Adaptive systems

Prototype RT-70

Operation wind velocity for millimeter waveband

to 18m/sto 10m/sto 2m/s

Waveband (5…8)cm dm

(1…4)mm(0,8…3)cm

m

Antenna pattern width 2,5’ 3”

Programmable coordinates acquisition error at wind velocities more 10m/s to 10m/s to 2m/s

20” 15” 5”

5” 1,5”

Root-mean-square error of reflecting surface from theoretical profile primary mirror counter reflector

0,8mm 0,4mm

0,07mm 0,1mm

Main design and operation characteristics of prototype and RT-70


Adaptive systemsMain measuring tasks RT-70


Adaptive systemsAdaptive surface of the main mirror, consisting of 1188 adjustable shields

Actuator experimental model. Positioning accuracy - 0,005mm


UWB Digital Signal Processing

UWB Radio astronomy on Ratan-600 complex (realized). Up to 2 GHz bandwidth signals. Real-time processing system on base of ADQ108 PXIe unit with Xilinx 6 LX240T FPGA.

Up to 6,4 Gs/s streaming8-bit resolution1Gb onboard memory2 GHz analog bandwidthPXIe x4512K frequency channels in real-time


Electromagnetic Compatibility


Electrodynamics modeling


Electrodynamics modelingPROGRAM COMPLEXES FOR CALCULATION OF AREAS OF ANTENNA'S RADIATION AND DISPERSION ON THE OBJECTS OF COMPLEX GEOMETRICAL SHAPE “VOLNA” and “ALEKS”

Complex capacities:Program complex for calculating parameters and characteristic of antennas and objects of complex geometrical shape, represented in the form of wire structures, considering multi-layer dielectric structures of underlying terrain.

Peculiarities of the program:• accounting of a passive network structure• variation of geometrical and electrodynamic parameters of antenna models


Electrodynamics modelingPROGRAM COMPLEX FOR LARGE DEPLOYMENT REFLECTOR MODELING

Program complex allows to make calculations of basic characteristics of large deployment reflectors taking into account reflector-type parasitics surface deviations. Practically all factors are taken into account:

• geometric distortion and deviation of reflector-type parasitic surface; • instrumental errors of support installation; • "matrix" effect; • thermal distortion caused by uneven heating of reflector.

Program complex allows to optimize reflector's surface according to different criteria, improving characteristics of antenna system by doing this. Return files on calculations of reflector's surface are compatible with AutoCAD и 3DSmax formats.

Field in the focal plane RT-70

The spatial pattern of the antenna under the influence of interference


Electrodynamics modelingPROGRAM COMPLEX FOR CALCULATION OF ELECTROMAGNETIC

COMPATIBILITY OF RADIOELECTRONIC EQUIPMENTS ON THE DIFFERENT OBJECTS TAKING INTO CONSIDERATION CHARACTERISTICS OF RECEIVING AND

TRANSMITTING DEVICES

Vessel and its model

SCIENTIFIC CENTER OF APPLIED ELECTRODYNAMICS Areas of Activities: UHF Antennas and Equipment UWB...

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