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+//example:-10.3.page no.-560.
+// program to design a resonance isolator using the H-plane ferrite slab geometry in x-band.
+f=10*10^9;delta_sbys=0.01;forpims=1700;deltaH=200;
+revatt=30;ko=(2*%pi*f)/(3*10^8);
+Ho=f/(2.8*10^9);
+// for x-band waveguide, a=2.286 cm.
+a=2.286;
+kc=(%pi*100)/a;
+betao=sqrt(ko^2-kc^2);
+x=(1/%pi)*atan(kc/betao); // x=c/a.
+L=revatt/2;
+disp(L,'the slab length required for 30db total reverse attenuation in cm = ')
+disp(kc,'cut-off wave number in m-1 = ')
+disp(betao,'propagation constant = ')
+\ No newline at end of file