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+//Chapter 4: Radiation
+//Example 4-6.1
+clc;
+
+//Variable Initialization
+Im = 5              //Maximum current (A)
+r = 1e3             //Distance (km)
+eta = 120*%pi   //Intrinsic impedance (ohm)
+theta = 60*%pi/180          //Angle of radiation (radians)
+
+//Calculation
+sin2 = sin(theta)**2       //Sine squared theta (unitless)
+P_av = (eta*(Im**2))/(8*(%pi**2)*(r**2))
+P_av = P_av*(cos(%pi/2*cos(theta))**2)/(sin2)                        //Average power (W)
+
+//Result
+mprintf("The average power available at 1km distance is %e W",P_av)