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//Chapter-9 example 13
//=============================================================================
clc;
clear;
//input data
F = 4*10^9;//radar operating frequency in hz
Vo = 3*10^8;//velocity of EM wave in m/s
NNBW = 2;//Null to Null Beamwidth in degrees
//Calculations
lamda = Vo/F;//wavelength
Da = (140*lamda)/2;//diameter of antenna in m
Gp = 6.4*(Da/lamda)^2//gain of parabolic reflector
G = 10*log10(Gp)//gain in dB
//Output
mprintf('Gain of parabolic reflector is %g dB\n mouth diameter of the antenna is %g m ',G,Da);
//=============end of the program==============================================
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