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Radiation Pattern For Dipole Antenna

clc;
theta=0:0.12:pi;%theta vector
lamda=1;% length of antenna in terms of wavelengths
l=0.5*lamda;
r=1000;
I0=0.1;% max current in antenna structure
n=120*pi;%eta
% evaluating radiation intensity(U)
U1=( n*( I0^2 )*( ( cos(l*cos(theta)/2) - cos(l/2) )./ sin(theta) ).^2 )/(8*(pi)^2.*(r)^2);

polar(theta,U1);

P=((I0^2)*(0.5*l)^2*377.9)/(48*pi);
fprintf('Power radiation for 0.5 lambda:');
disp(P);
fprintf('U1:');
disp(U1);

title('Radition Pattern for Dipole Antenna (length=1.25lamda)')
xlabel('x-axis--->')
ylabel('y-axis--->')


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