计算均匀线阵的3dB波束宽度matlab代码.zip

clear; clc; close all; %% Basic Electromagnetic Parameters Frequency = 10e9; Lightspeed = physconst('LightSpeed'); Wavelength = Lightspeed/Frequency; Wavenumber = 2*pi/Wavelength; %% Array Parameters N =6; X = (1:N)*Wavelength/2; I = ones(1,N); alpha = zeros(1,N); %% ArrayFactor Samping Ns =1000;% Sampling number theta = linspace(-60,60,Ns); E =zeros(1,Ns); for num = 1:Ns E(num)=sum(I.*exp(1j*(Wavenumber*X*sind(theta(num))+alpha))); end %% plot figure E_dB = db(E)-max(db(E)); figure() plot(theta,E_dB,'LineWidth',2);%normalized xlabel('\theta(\circ)');ylabel('dB'); ylim([-40,0]); grid on set(gca,'Fontsize',19) %% [hpbw,ang_max] = cal_hpbw_2d(E_dB,theta);