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+//Chapter-11 example 40
+//=============================================================================
+clc;
+clear;
+//Given data
+F  = 9.5*10^9;       //radar operating frequency in Hz
+Vo = 3*10^8;        //vel in m/s;
+G  = 20;            //antenna gain in dBi;
+R  = 50*10^3;       //distance of radar reflected signal from target
+Pt = 10*10^3        //Tx power in watts
+CS = 10;            //cross sectional area in m^2
+
+// Calculations
+Gain  = 10^(G/10)   //G = 10log(Gain) ==>gain - antilog(20/10);
+Gr    = Gain;       //gain of tx antenna and Rx antenna
+Gt    = Gain
+lamda = Vo/F
+Pr= (lamda*lamda*Pt*Gt*Gr*CS)/((4*4*4*%pi*%pi*%pi)*(R^4))//received power in watts
+
+// Output
+mprintf('Received signal Power is %g Watts',Pr);
+//=============================================================================
+
+
+