tianxinazhen.txt

好好学习下哈 4个偶极子天线阵的辐射场图 学习啊

clear all
 N = 10; d = 0.5; alpha = 2*pi; 
dip=[1:N]; 
kd=2*pi*d; 
phi=[0:2*pi/800.1:2*pi]; 
framemax = 48; 
M = moviein(framemax); 
set(gcf,'Position',[100 100 640 480]) 
for n=1:framemax 
u=kd*cos(phi)-alpha/framemax*(n-1); 
F=abs(sin(N.*u./2+N*1e-15)./sin(u./2+1e-15)); 
plot(F.*cos(phi),F.*sin(phi),'r','LineWidth',3); %polar(phi,abs(F)); 
title([ num2str(N),' elements, '... ,num2str(d),' \lambda apart'],'fontsize', 18) 
xlabel(['\alpha=' ,num2str(alpha/framemax*(n-1))],'Color','k','fontsize', 18) 
hold on 
plot(N.*cos(phi),N.*sin(phi),'b','LineWidth',2); 
plot(dip-N/2-0.5,dip*0,'o','linewidth',3) 
hold off 
axis equal 
M(:,n) = getframe(gcf); 
end 
clf 
reset 
set(gcf,'Position',[100 100 800 600]) 
axis off 
movie(M,1,6)