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//Chapter 11: Broadband and Frequency-Independent Antennas
//Example 11-7.1
clc;
//Variable Initialization
gain_dbi = 7.0 //Gain (dBi)
bandwidth = 4 //Relative bandwidth (unitless)
s_lambda = 0.15 //Spacing (lambda)
k = 1.2 //Scale constant (unitless)
//Calculation
alpha = atan((1-1/k)/(4*s_lambda))*180/%pi //Apex angle (degrees)
n = round(log(bandwidth)/log(k)) //Number of elements(unitless)
n =n + 1
n =n + 2 //Number of elements considering conservative design (unitless)
//Result
mprintf("The apex angle is %.1f degrees",alpha)
mprintf("\nThe number of elements is %d", n)
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