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+// example:-8.11,page no.-444.
+// calculate the even and odd-mode characteristic impedences for a tapered coupled line 180 deg. hybrid for a 3 db coupling ratio and a 50 ohm characteristic impedence.
+alpha=0.707;bta=0.707;Zo=50;
+k=(1-alpha)/(1+alpha);
+Zoe=Zo/k;
+Zoo=k*Zo;
+disp(Zoo,'Zoo =  ')
+disp(Zoe,'at (Z=L) the characteristic impedences of the coupled line must be = ')
+disp('at Z=0,there will be no coupling')
+\ No newline at end of file