Antenna Toolbox

Analysis, Benchmarking, and Verification

Antenna and array analysis, meshing, solvers, comparison of Antenna Toolbox™ simulations with measured results

Solvers

MoM, physical optics, hybrid MoM-PO, wire basis, and FMM solvers

Solver Types	Materials	Applications
Method of Moments (MoM) solver using free-space Green's function	Metals and dielectrics	Antennas and arrays
MoM solver using periodic Green's function	Metals and dielectrics	Infinite arrays
Physical optics (PO) solver	Metals	Radar cross sections
Hybrid MoM-PO solver	Metals	Electrically large antennas, installed antennas
Fast Multipole Method (FMM) solver	Metals and dielectrics	Electrically large antennas, installed antennas
MoM solver using wire basis	Metals	Wire antennas

Physical optics(PO) solver

Antenna Toolbox™ 中的物理光学 (PO) 求解器可让您求解目标的 RCS。在物理光学(PO)中，入射场用于计算结构表面上响应撞击平面波的电流。利用可用的电流，您可以获得远场中所需点的散射场。

子域 RWG 基本函数和额外维度

熟悉的三角形 Rao-Wilton-Glisson (RWG) 基函数基于 [2]。

Radar Cross Section Benchmarking

本例在三种结构上执行雷达截面(RCS)计算的基准测试：方形板(square plate)，圆形板(circular plate)和NASA杏仁。方形和圆形板的基准测试是针对基于分析物理光学的解决方案进行的，在NASA杏仁体的情况下，比较是与矩量法(MoM)解决方案进行的。

Square Plate RCS Parameters Setup

确定方形板的物理尺寸、波长和频率，板是使用STL文件定义的。

lambda = 3.25e-2;
f1 = physconst('lightspeed')/lambda;
L = 10.16e-2;
W = 10.16e-2;
p = platform;
p.FileName = 'square_plate.stl';
p.Units = 'm';

Analyze and Compare with Analytical result

RCS计算在仰角= 0°的仰角平面上进行，电场极化矢量设为HH。这意味着在RCS计算中使用发送时的水平分量和接收时的水平分量。将工具箱中的RCS结果与[1]中提供的分析结果进行比较。

az = 0;
el = 0.05:0.5:90;
sigma = rcs(p, f1, az, el, 'Polarization', 'HH'); 
asigma1 = rectPlateRCS(L, W, f1, az, 90-el);
figure
plot(el, sigma, 'r',el, asigma1,'b--','LineWidth',2)
grid on
xlabel('Elevation angle (degree)')
ylabel('RCS (dBsm)')
title('Analytical vs Numerical PO')
legend('PO-Numerical','PO-Analytical','Location','best');
legend boxoff;  % 图例不加框