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x=700:50:1500;
y=0:0.2:1;
f=0.74;
s1=2.56;
s2=1;
R=300;
s0=f*s1+(1-f)*s2;
G=2.45/(4*R);
d=2*2.45*R/3;
xb=2*d*sqrt(s0);
c=x/xb-1;
k0=1.47*2*pi/x;
k1=1.5*2*pi/x;
k=k0*s0^(1/2)[1+c+(4c^2-sqrt(U/s0)^2)/2)];
h=(k1-k0)*d/2;
b=ko*(1-z)/(k-k*z+G*z);
z=(k^2-s0*ko^2)/(U*k0^2);
y=2*b*exp(-i*k1*d)*exp(i*h)/[2bcos(k*d)-i(1+b*b)sin(k*d)];
plot(x,y)
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k=k0*s0^(1/2)[1+c+(4c^2-sqrt(U/s0)^2)/2)];
showmethemoney
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