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//Chapter 15: Antennas for Special Applications
//Example 15-13.3
clc;
//Variable Initialization
lambda_g = 1.5 //Wavelength in guide (lambda)
m = -1 //Mode number
//Calculation
phi = acos((1/lambda_g)+m)*180/%pi //Forward tilt angle (degrees)
//Result
mprintf("The beam angle is %.1f degrees",phi)
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