?? sa_ex2_13.m
字號:
% General envelope of standing wave for planewaves
% normally incident on a planar boundary . Medium 1 is assumed to be free space
% medium 2 is specified by the user
% Frank B. Gross
% Electrical and Computer Engineering
% 2525 Pottsdamer St.
% Tallahassee, Florida 32310
% (850) 410-6410
% Date: 10/08/02
imp=input('Normalized impedance of medium 2=');
G=(imp-1)/(imp+1);
angg=atan2(imag(G),real(G));
bz=-4*pi:.001:0;
figure;
env=sqrt(1+abs(G)^2+2*abs(G)*cos(2*bz+angg));
plot(bz,env,'k')
axis([-4*pi 0 0 1.5])
xlabel('\betaz')
ylabel('|E_1|')
grid on
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