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+//Chapter 2: Antenna Basics
+//Example 2-11.1
+clc;
+
+//Variable Initialization
+P_t = 15        //Transmitter power (W)
+A_et = 2.5      //Effective aperture of transmitter (meter^2)
+A_er = 0.5      //Effective aperture of receiver (meter^2)
+r = 15e3        //Distance between the antennas (Line of sight) (m)
+frequency  = 5e9     //Frequency (Hz)
+c = 3e8         //Speed of light (m/s)
+
+//Calculation
+wave_len = c/frequency                               //Wavelength (m)
+P_r = (P_t*A_et*A_er)/((r**2)*(wave_len**2))    //Received power (W)
+
+//Result
+mprintf("The power delivered to the receiver is %.2e watts",P_r)