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+//Chapter-11 example 36
+//=============================================================================
+clc;
+clear;
+//input data
+Pt = 20*10^6;//peak pulse power in watts
+RCS  = 1;//radar cross sectional area in m^2
+f   = 3*(10^9);//radar operating frequency
+Vo   = 3*(10^8);//vel of Em wave in m/s;
+D    = 50;//diameter of antenna in m
+F    = 2;//receiver noise figure 
+BW   = 5000;//receiver bandwidth
+
+//calculations
+
+lamda = Vo/f//wavelength in m
+Rmax = 48*((Pt*(D^4)*RCS)/(BW*lamda*lamda*(F-1)))^0.25;
+
+//output
+mprintf('Maximum Radar range of the Radar system is %g Kms\n ',Rmax/1000);
+mprintf('Note:In textbook All values are correctly substituted in calculating Rmax.\n but incorrect final answer is printed in the book');
+
+//==============end of the program=============================================