1. No category

Simple MoM Software in MATLAB

S. N. Makarov, Antenna and EM Modeling with MATLAB,
2002.

RWG basis functions
N
 
 
J  r    x n jn  r 
n 1
1
0 .5
0
-0 . 5
-1
1
1
0 .5
0
0
-0 . 5
-1
JHLin, CEM; MoM
-1
22
Simple MoM Software in MATLAB

Galerkin’s method
JHLin, CEM; MoM
23
Simple MoM Software in MATLAB

View the shapes of receiving antennas

viewer platecoarse

viewer platefine

viewer dipole

viewer slot

Built-in mesh generator of the MATLAB PDE toolbox, pdetool.

Code sequence



JHLin, CEM; MoM
rwg1.m --- the edge elements are created.
rwg2.m --- output the subtriangle’s midpoints for each triangle
patch.
rwg3.m --- contains f ,  0 , and 0 . impmet.m is called to output
impedance.mat.
24
Simple MoM Software in MATLAB
JHLin, CEM; MoM
25
Simple MoM Software in MATLAB
JHLin, CEM; MoM
26
Simple MoM Software in MATLAB
JHLin, CEM; MoM
27
Simple MoM Software in MATLAB



1.
rwg4.m --- determines the excitation vector; solves the system of
equations to produce current.mat.
rwg5.m --- calculates and plots the resulting surface current
density on the surface.
rwg6.m --- supplementary.
Given surface current distribution
electromagnetic field
JHLin, CEM; MoM
radiated
28
Simple MoM Software in MATLAB
1.

efield1.m --- ObservationPoint=[5; 0; 0];

efield3.m --- ObservationPoint=[0 y z]';
The surface current distribution due to an applied voltage in the
antenna feed. Code sequence.

Fig. 4.5
Vm  n  
Tn
Vm  
 Tn
Tn  Tn

JHLin, CEM; MoM
E  fn dS  V 
Tn
 Tn
 ( y )y  fn dS  lnV
0  fm dS  0
for edge element m  n
otherwise
rwg4.m --- FeedPoint=[0; 0; 0];
29
JHLin, CEM; MoM
30
Simple MoM Software in MATLAB
JHLin, CEM; MoM
31
Simple MoM Software in MATLAB
JHLin, CEM; MoM
32