数字相控阵Matlab仿真

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理论知识参考：数字多波束相控阵基础知识
仿真代码

close all; clc;
fc = 1e+6;   %载波频率
fs = 128*fc; %采样频率
c = 3e+8;    %光速
Wave_length = c/fc; %波长
figure;
for var = 0.1:0.1:1
	N = 10;      %阵元个数
	n = (0:N-1)';%阵元编号
    d = var*Wave_length; %阵元间距
    theta_0 = 10;        %期望角度
    tau = d*sind(theta_0)/c;   %相邻阵元延时
    W = exp(1i*2*pi*fc*n*tau); %权值矩阵
    step = 1;
    theta = -90:step:90;
    for m = 1:length(theta)
        V = exp(1i*2*pi*fc*n*d*sind(theta(m))/c); %方向矢量
        Beam(m) = abs(W'*V); %方向图
    end
    plot(theta,Beam);
    title(sprintf('d=%2f',var));
    pause(0.5);
end
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运行结果(改变阵元间距d，阵元个数N=10)

运行结果(改变阵元个数N，阵元间距d=0.5)