【限免】频控阵雷达：概念、原理与应用【附MATLAB代码】

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PDA、FDA MATLAB代码

%----------------------------------------
%功能:FDA和相控阵天线方向图
%版本:ver1.0
%时间:2017.11.1
%---------------------------------------
clear all;
clc;
disp('相控阵天线方向图请输入：1');
disp('频控阵天线方向图请输入：0');
flag=input('输入：');
close all;
%相控阵天线方向图
if flag == 1
    disp('%相控阵天线方向图');
    N = 12;
    alfa = -160*pi/180:0.1*pi/180:160*pi/180;
    beta = 0*pi/180;
    len = length(alfa);
    falfabeta = zeros(1, len);
    for i=1:len
        if abs( sin(alfa(i)) - sin(beta) )<= 1e-6;
            falfabeta(i) = N;
            continue;
        else
            falfabeta(i) = sin( N*pi/2*( sin(alfa(i)) - sin(beta) ) )/sin( pi/2*( sin(alfa(i)) - sin(beta) ) );
        end
    end
    alfa = alfa*180/pi;
    figure;
    plot(alfa, falfabeta);
    title('未归一相控阵方向图');
    ylabel('幅度');
    xlabel('方位角(°)');
​
    fimagesec = falfabeta;
    falfabeta = abs(falfabeta/max(abs(falfabeta)));
    figure;
    plot(alfa, falfabeta);
    title('归一化相控阵方向图');
    ylabel('归一化幅度');
    xlabel('方位角(°)');
    figure;
    title('相控阵方向图');
    x=[-60 60];
    y=[-4 12];
    clims = [-3 N];
    imagesc(x,y,fimagesec,clims);
    colormap(jet);
    colorbar
    figure;
    falfabeta = N*falfabeta;
    clims = [0 N];
    imagesc(x,y,falfabeta,clims);
    colormap(jet);
    colorbar
else 
    disp('%频控阵天线方向图');
    N = 12;%调节线条粗细
    alfa = -80*pi/180:0.01:80*pi/180;
    len = length(alfa);
    range = 20e4-1:-(20e4/len):0;
    falfabeta = zeros(len, len);
    f0 =10e9;
    c  = 3e8;
    d  = c/(2*f0);
    deltaf = 3e3;
    t = 0;
    for i=1:len
        for j=1:len
            if abs(sin( pi*( deltaf*t - deltaf*range(i)/c  + sin(alfa(j))/(2)  ) )) <= 1e-6 ;
                falfabeta(i,j) = N;
                continue;
            else
              falfabeta(i,j) = abs(sin( N*pi*( deltaf*t - deltaf*range(i)/c - sin(alfa(j))/2  ) )...
                 / sin( pi*( deltaf*t - deltaf*range(i)/c - sin(alfa(j))/2  ) )) ;
            end
        end
    end
%     figure,polar3d(alfa, range,(falfabeta));
    figure;
    mesh(alfa,range,(falfabeta));
    figure;
    x=[-80 80];
    y=[1 2e4];
    clims = [-3 N];
    imagesc(x,y,falfabeta,clims);
    colormap(jet);
    colorbar
end
​
​

PDA、FDA MATLAB仿真结果

PDA相控阵

FDA频控阵