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//Chapter-9 example 9
//=============================================================================
clc;
clear;
//input data
F = 9*10^9;//radar operating frequency in hz
Vo = 3*10^8;//velocity of EM wave in m/s
Gp = 100;//power gain of antenna in dB
//Calculations
lamda = Vo/F;//wavelength
//antilog calculation
//100 = 10log10(Gp);
//10 = log(Gp);
G = 10^10;//gain of antenna
Da = lamda*sqrt(G/6.4)//diameter of parabolic antenna in m
A = (%pi*Da*Da)/4;//Area of antenna
Ac = 0.65*A;//capture area
NNBW = 140*(lamda/Da);//beamwidth b/w null to null
HPBW = 70*(lamda/Da);//half power beamwidth in deg
//Output
mprintf('NNBW of parabolic reflector is %g degrees\n HPBW of parabolic reflector is %g degrees\n',NNBW,HPBW);
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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