theta = (-180:0.1:180);

%图1.不同阵元数目的线阵天线方向图

[AF1] = N_matlab_tcwang(5,0.5,0);

[AF2] = N_matlab_tcwang(10,0.5,0);

[AF3] = N_matlab_tcwang(20,0.5,0);

% 绘制方向图

AF1=AF1/max(AF1);

AF2=AF2/max(AF2);

AF3=AF3/max(AF3);

subplot(3,2,1);

plot(theta,AF1,'r',theta,AF2,'k',theta,AF3,'g'); % 绘制方向图

legend('5阵元','10阵元','20阵元');

grid on;

xlabel('角度(度)'); ylabel('归一化电压幅度'); title('图1.不同阵元数目的线阵天线方向图');

xlim([-180 180 ]);

AF1=20*log10(AF1/max(AF1));

AF2=20*log10(AF2/max(AF2));

AF3=20*log10(AF3/max(AF3));

subplot(3,2,2);

plot(theta,AF1,'r',theta,AF2,'k',theta,AF3,'g'); % 绘制方向图

legend('5阵元','10阵元','20阵元');

grid on;

xlabel('角度(度)'); ylabel('归一化电压幅度(dB)'); title('图2.不同阵元数目的线阵天线方向图');

xlim([-180 180 ]);ylim([-100 0]);

[AF1] = N_matlab_tcwang(10,0.25,0);

[AF2] = N_matlab_tcwang(10,0.5,0);

[AF3] = N_matlab_tcwang(10,1,0);

% 绘制方向图

AF1=AF1/max(AF1);

AF2=AF2/max(AF2);

AF3=AF3/max(AF3);

subplot(3,2,3);

plot(theta,AF1,'r',theta,AF2,'k',theta,AF3,'g'); % 绘制方向图

legend('d=0.25*lambda','d=0.5*lambda','d=1*lambda');

grid on;

xlabel('角度(度)'); ylabel('归一化电压幅度'); title('图3.不同阵元间距的线阵天线方向图');

xlim([-180 180 ]);

AF1=20*log10(AF1/max(AF1));

AF2=20*log10(AF2/max(AF2));

AF3=20*log10(AF3/max(AF3));

subplot(3,2,4);

plot(theta,AF1,'r',theta,AF2,'k',theta,AF3,'g'); % 绘制方向图

legend('d=0.25*lambda','d=0.5*lambda','d=1*lambda');

grid on;

xlabel('角度(度)'); ylabel('归一化电压幅度/dB'); title('图4.不同阵元间距的线阵天线方向图');

xlim([-180 180 ]);ylim([-100 0]);

[AF1] = N_matlab_tcwang(10,0.5,-60);

[AF2] = N_matlab_tcwang(10,0.5,0);

[AF3] = N_matlab_tcwang(10,0.5,30);

% 绘制方向图

AF1=AF1/max(AF1);

AF2=AF2/max(AF2);

AF3=AF3/max(AF3);

subplot(3,2,5);

plot(theta,AF1,'r',theta,AF2,'k',theta,AF3,'g'); % 绘制方向图

legend('-60°','0°','30°');

grid on;

xlabel('角度(度)'); ylabel('归一化电压幅度'); title('图5.不同主瓣指向的线阵天线方向图');

xlim([-180 180 ]);

AF1=20*log10(AF1/max(AF1));

AF2=20*log10(AF2/max(AF2));

AF3=20*log10(AF3/max(AF3));

subplot(3,2,6);

plot(theta,AF1,'r',theta,AF2,'k',theta,AF3,'g'); % 绘制方向图

legend('-60°','0°','30°');

grid on;

xlabel('角度(度)'); ylabel('归一化电压幅度/dB'); title('图6.不同主瓣指向的线阵天线方向图');

xlim([-180 180 ]);ylim([-100 0]);