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//Chapter-9 example 7
//=============================================================================
clc;
clear;
//input data
Da = 5;//diameter of parabolic antenna in m
F = 5*10^9;//radar operating frequency in hz
Vo = 3*10^8;//velocity of EM wave in m/s
//Calculations
lamda = Vo/F;//wavelength
R = (2*Da*Da)/lamda;//min distance b/w antennas
//Output
mprintf('Minimum distance Required is %g m',R);
//=============end of the program==============================================
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