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// Example 4.1
// To find far field distance for antenna with maximum dimensions and operating frequency
// Page No.109
clc;
clear all;
// Given data
D=1; // Maximum dimension in m
f=900*10^6; // Operating frequency in Hz
C=3*10^8; // Speed of light in m/sec
lambda=C/f; // Carrier wavelength in m
// To find far field distance
df=(2*D^2)/lambda; //Far field distance
//Displaying the result in command window
printf('\n Far field distance = %0.0f meter',df);
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