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+//Chapter-11 example 63
+//=============================================================================
+clc;
+clear;
+//Given data
+Pt      = 2*10^6;       //Peak power in Watts
+G       = 45;           // antenna gain in dB
+f       = 6*10^9;       // operating frequency 
+Te      = 290;          // effective temp in kelvin
+SNRmin  = 20;           // min SNR in dB
+PW      = 0.2*10^-3     // pulse width in sec
+F       = 3;            // Noise Figure
+B       = 10*10^3;      // bandwidth in KHz
+RCS     = 0.1;          // Radar cross section in m^2
+K       = 1.38*10^-23;  // boltzman constant
+Vo      = 3*10^8;       //vel of Em wave in m/s;
+
+//antilog acalculations
+G1     = 10^(45/10);    // antilog conversion of gain
+SNR    = 10^(20/10);    // antilog conversion of SNRmin
+F1     = 10^(3/10);     // antilog conversion of Noise Figure
+
+lamda  = Vo/f;          //wavelength in m
+Rmax   = ((Pt*G1*G1*lamda*lamda*RCS)/((64*%pi*%pi*%pi)*(K*Te*B*F1*SNR)))^0.25;
+//pt1    = 10*log10(Pt)
+//lamda1 = 10*log10(lamda^2)
+//G2     = 2*G
+//KTB    = 10*log10(K*Te*B)
+//RCS1   = 10*log10(RCS)
+//p      = 10*log10((4*%pi)^3)
+//R4max  = [pt1+G1+lamda1+RCS1-p-KTB-F-SNRmin];
+
+//Output
+mprintf('Maximum Range of the Radar is %3.2f Km',Rmax/100);
+mprintf('\n Note: Calculation error i Textbook in multiplying K*Te*B');