gbo.rar_matlab天线_天线方向图 matlab_天线波束_阵列天线_阵列天线仿真

clc clear all; close all B=[-6 0 0 -6];%电流 B=10.^(B/20); B=[0.45 1 1 0.5]; A=exp(j*[00 180 180 180 ]/180*pi);%相位 freq=2018; boch=300/freq*1000; dx=65; dys=4; num=360; F=zeros(dys,num); theta=[-num/2:num/2-1]; dy=danyuan; for m=1:num E=dy(m)*B.*exp(j*2*pi*[0:dys-1]*dx/boch*sin(theta(m)/180*pi)); f(:,m)=A*E.'; end sz=size(f.'); max0=ones(sz(1),1)*max(abs(f).'); mp=max(abs(f).') p=20*log10(abs(f).'./max0); p=p.'; plot([-num/2:num/2-1]/num*2*180,p) grid on hold on axis([-180,180,-42,0]) set(gca,'xtick',[-180:30:180]); set(gca,'ytick',[-42:1:0]); num1=num; fw=find(p>=-3); tht=[-num1/2:num1/2-1]/num1*2*180; bw=tht(fw(end)+1)-tht(fw(1)-1) text(80,-4.2,'波束宽度为:' ) ; text(153,-4.2, num2str(bw)) ; text(167,-4.2, '度') title('+45度广播波束')