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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)