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//Chapter 2: Antenna Basics
//Example 2-3.2
clc;
//Variable Initialization
e_half_power = 1/sqrt(2) //E(theta) at half power(unitless)
e_null = 0 //E(theta) = 0 at null points (unitless)
theta_1 = 0 //theta' (degrees)
theta = 1 //theta (degrees)
//Calculation
for x=0:2 //loop untill theta = i
theta = 0.5*acos(e_half_power/cos(theta_1*%pi/180)) //theta(radian)
theta_1 = theta*180/%pi //theta(degrees)
end
hpbw = 2*(theta*180/%pi) //Half-power beamwidth (Degrees)
theta = 0.5*acos(e_null) //theta (radians)
fnbw = 2*(theta*180/%pi) //Beamwidth between first null (degrees)
//Result
mprintf("The half power beamwidth is %.2f degrees",hpbw)
mprintf("\nThe beamwidth between first nulls is %d degrees", fnbw)
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