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// Chapter 3 example 16
//------------------------------------------------------------------------------
clc;
clear;
// Given data
a = 7.2 ; // width of waveguide in cm
b = 3.4; // narrow dimension of waveguide in cm
c = 3*10^10; // free space velocity of EM wave in cm/s
f = 2.4*10^9; // frequency in Hz
// Calculation
lamda = c/f // free space wavelength in cm
lamda_c = 2*a // cutoff wavelength in cm
lamda_g = lamda/sqrt(1 - (lamda/lamda_c)^2); // guide wavelength in cm
vp = (lamda_g * c)/lamda // phase velocity in cm/s
vg = c^2/vp; // group velocity in cm/s
// Output
mprintf('Group velocity = %3.1e cm/s\n Phase Velocity = %3.1e cm/s',vg,vp);
//------------------------------------------------------------------------------
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