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+//Chapter 8: Helical Antennas
+//Example 8-16.1
+clc;
+
+//Variable Initialization
+gain = 24.0   //Gain (dB)
+alpha = 12.7    //Pitch angle (degrees)
+c_lambda = 1.05 //Circumference (lambda)
+s_lambda = 0.236    //Spacing between turns (lambda)
+
+//Calculation
+D = 10**(gain/10)   //Directivity (unitless)
+L = D/(12*(c_lambda**2))    //Helix length (lambda)
+n = L/s_lambda              //Number of turns (unitless)
+D = D/4             //Directivity for four 20-turn helixes(unitless)
+Ae = D/(4*%pi)       //Effective aperture of each helix (lambda^2)
+
+//Result
+mprintf("The Axial length is %.0f lambda",L)
+mprintf("\nThe number of turns for the axial length is %d",n)
+mprintf("\nThe effective aperture for 20 turns is %.0f lambda square",Ae)