The gain G of a certain microwave dish antenna can be expressed as a function of angle by the equation. Plot this gain function on a polar plot, with the title “Antenna Gain vs” in boldface.

The gain G of a certain microwave dish antenna can be expressed as a function of angle by the equation

where θ is measured in radians from the boresite of the dish, and sinc x=sin x/x. Plot this gain function on a polar plot, with the title “Antenna Gain vs” in boldface.

clear all;
close all;
 
theta = -pi/2:pi/30:pi/2;
y = abs(sin(4.*theta)./(4.*theta));
 
polarplot(theta,y,'-b')
title("Antenna Gain Vs \theta")