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clc;
close();
clear();
//page no 554
//prob no. 17.5
theta_3dB=.3; // minimum practical beamwidth in degree
eta_1=.6; //illumination efficiency
G=eta_1*48000/(theta_3dB)^2; //gain calculation
mprintf('The Gain is G= %.0f \n',G)
G_dB=10*log10(G); //dB gain
mprintf('The Gain in dB is G(dB)= %.1f dB \n',G_dB)
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