www.gusucode.com > rf 案例源码程序 matlab代码 > rf/DrawCirclesOnSmithChartExample.m

    %% Draw Circles on Smith Chart
%  Create an amplifier object from |default.s2p|.
amp = read(rfckt.amplifier,'default.s2p');
%%
% Plot the noise figure of the amplifier 1.9 GHz.
fc = 1.9e9;
circle(amp,fc,'Stab','In','Stab','Out','NF',10.396);
legend('Location','SouthEast')