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//Chapter-9 example 12
//=============================================================================
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 = 8;//Null to Null beamwidth in degrees
//Calculations
lamda = Vo/F;//wavelength
Da = (140*lamda)/NNBW;
A = (%pi*Da*Da)/4;//Area of antenna
Ac = 0.65*A;//capture area
//Output
mprintf('\n Mouth diameter of parabolic reflector is %3.3f m \n Capture area is %3.2f m^2',Da,Ac);
//=============end of the program==============================================
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