1
A.O. Boryssenko1) & D.H. Schaubert2)
Antenna LaboratoryUniversity of Massachusetts
Amherst MA 01003 USA1)[email protected])[email protected]
UMass Method of Moment UWB Simulator
2
Outline
Object-Oriented DesignProgramming in Matlab Macros ScriptsMulti- Component/Task/SolverTemplate LibrariesMatlab-Based Code with FORTRAN DLLs
Basic Concepts
Validation
Physical Phenomenology& Design of UWBLinks
Using Commercial EM SoftwarePrototyping, Practical Design & Tests
Optimal Driving WaveformsOptimal Termination ConditionsAntenna-Signal Co-DesignAntenna-Circuit Co-DesignMeeting to Different Link Merits Source Localization and Imaging with Arrays
3
Preprocessor, Engines and Postprocessors
Preprocessor Engines Postprocessor
Geometry
Materials
Freq Domain
Time Domain
SPICE IntegrationArray Configurations
Antennas/Arrays
Tx/Rx Circuitry
Terminal & Radiation
… Supported in current FD version … Tested in other versions
4
UMass MoM UWB Link Simulator :: Interface Basics
Four Key Element of Task Specification =Matlab Structural Variables
5
Coding of Simulation Scene
Scene.DD=1.8;Scene.tol=1e-6;Scene.Unit='cm';Scene.Figure=1;%Scene.Component(1).Script='Geo_Antenna1';Scene.Component(1). Material=2;Scene.Component(1).MoveToPosition=[0 0 0]; Scene.Component(1).RotateToAngle=[0 0 0];Scene.Component(1).ZLoad=125;Scene.Component(1).ZLine=[125 4 1]; Two-antenna UWB link samples
6
Flat Dipole Template
TEM Horn Template
7
UWB Simulator Interface: Task Coding
%%% TASK #1%Task(1).Component(1).Port(1).Index=[1];Task(1).Component(1).Port(1).Amplitude=1;%%% TASK #2%Task(2).Component(1).Wave(1).Amplitude=1;Task(2).Component(1).Wave(1).DirectionOfArriving=[90 0];Task(2).Component(1).Wave(1).Polarization=[2];
Some key steps in simulation are GUI-supported
8
%%% SOLVER%Solver(1).FreqBand=[0.05:0.75:4.0]'*1e9; % Hz;…
UWB Simulator Solver:: Specifications & Acceleration
Fast Pade Frequency Sweeping = Efficient Search for High-Q resonances
Uniform sampling over the freq. band
20 freq. sampling points are used
High-Q resonances are not accurately caught
Pade adaptive sampling over the freq. band
20 freq. sampling points are used
High-Q resonances are precisely evaluated
9
UWB Simulator Interface: Post-Processor
%% Post #1 - ZINP%Post(1).ZINP.Task =1;Post(1).ZINP.Comp = 1;Post(1).ZINP.Port =1;Post(1).ZINP.Proc ='PadeApproxim_25';
Input Impedance of Tx Antenna
Smith Chart for Tx Antenna
Voltage at the load of Rx Antenna(Free-Space Propagation is Removed)
10
Antenna-Circuit Co-Design for UW Link:: Optimal Antenna Termination to Tx/Rx Front-Ends
A.O. Boryssenko, D.H. Schaubert, Antenna Link Transfer Function Factorization Applied to Optimized Channel Design, To be submitted to IEEE Trans. on Antennas & Propagation
A.O. Boryssenko, D.H. Schaubert, Dispersive Properties of Terminal-Loaded Dipole Antennas in UWB Link, Submitted to IEEE 2006 Antennas & Propag. Symposium
11
Antenna-Signal Co-Design for UW Link:: Optimal Driving Waveforms for Transmitter
Gaussian Pulse Optimal Signal “Matched” to FCC mask
Optimal Analog Pulse Optimal 3-bit Digitized Pulse
A.O. Boryssenko, D.H. Schaubert, Dispersive Properties of Terminal-Loaded Dipole Antennas in UWB Link, To be published in the Journal on VLSI Signal Processing, 2006
12
∑=
+⋅
=RxN
kkjkkj
jFocused
cdtVtW
tU
1,,
,
)()(
)(
Known Signal Processing Techniques:Kirchhoff Migration … Fast FK Migration … Range Compression …Axial Compression …
Focused Image
Time-Domain Near-Field Beam Forming (Focusing)
Rx Array Collected Raw Signals
color keyed to receivers
Simulation of Antenna and Array Imaging :: Optimal Driving Waveforms for Transmitter
13
Validation vs. Experiment in Two-Antenna Link
Phase of Received Voltage
Freq, GHz
Magnitude of Received Voltage
Time Response of Received Voltage
Time, ns
Freq, GHz
EM Coupling Between Two Probes over Finite Ground Plane
Top Related