radiation_intensity.m

patchantenna matlab code

function radiation = radiation_intensity(fr ,theta, phi, width, Leff, h)


% width = width of microstrip Antenna
% Leff = Effective length of Microstrip Antenna
% h = Thickness of Microstrip Antenna
% fr= Resonant Frequency
% This function will calculate the radiation pattern at any given angle for H plane and E plane
% Reference:
% Antenna THeory: Analysis and Design: by Balanis (chapter 14)



r=1;
fr=fr*(1e+9);
c=(2.9986e+8)*1000; %mm/sec
lamda_o=c/fr; %mm
ko=(2*pi)/lamda_o;
const=((j)*ko*h*width*(exp((-j)*ko*r)))/(2*pi*r);
X=(ko*h/2)*sin(theta)*cos(phi);
Y=(ko*width/2)*cos(theta);
radiation= ((abs(const*(sin(X)/X)*(sin(Y)/Y)*sin(theta)))^2)/(2*120*(pi^2));