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+//chapter-4 page 148 example 4.10
+//==============================================================================
+clc;
+clear;
+
+//For an air filled circular Waveguide in the dominant mode
+c=3*10^10;//Velocity of Light in cm/sec
+disp('For an air filled circular Waveguide TE11 is the dominant mode ie propagated');
+wc=10;//cutoff wave length in cm
+
+//CALCULATION
+r=((1.841*wc)/(2*(%pi)));//radius of circular Waveguide in cm
+A=(%pi)*r^2;//Cross sectional area of the guide in sq.cms
+fc=(c/wc)/10^9;//Cutoff frequency for TE11 mode in GHz
+disp('Cutoff frequency for TE11 mode in GHz is');
+disp(fc);
+disp('Frequncy above 3GHz can be propagated through the waveguide');
+
+//OUTPUT
+mprintf('\nCross sectional area of the guide is A=%2.2f sq.cms',A);
+
+//=========================END OF PROGRAM===============================