十元线阵指向性函数 10.90.80.70.60.50.40.30.20.10-100-80-60-40-20020406080100 如图2.1.2 改变频率f N=10; d=1; f=1500; c=2000;
theart0=30/180*pi; for n=1:181;
theart=(n-91)*pi/180;
% R1=sin(N*pi*d*f/c*(sin(theart)-sin(theart0))); % R2=N*sin(pi*d*f/c*(sin(theart)-sin(theart0)));
R(n)=sin(N*pi*d*f/c*(sin(theart)-sin(theart0)))/(N*sin(pi*d*f/c*(sin(theart)-sin(theart0)))); end
figure; hold on;
plot(-90:90,abs(R))
title('十元线阵指向性函数 ') grid on
十元线阵指向性函数 10.90.80.70.60.50.40.30.20.10-100-80-60-40-20020406080100 如图2.1.3