How to implement the math equation correctly to make a plot ?
조회 수: 2 (최근 30일)
이전 댓글 표시
I have a equation for irradiance distribution that says.
it's an radiance distribution where the k is the wave vector , Λ is the period between the emitting elements. Implementing the equaiton can give the plot showing below. I am struggling to implement this equation when I plug everything in all I get is a single value. How do I loop this equation and create a matrix so it can give me the plot that is shown below ?
%rectangular aperture array factor.
I_0 = 1;
lambda =1.55e-6;
k=(2*pi)/lambda;
period = 2e-6;
theta = 20;
numel=33;
I = I_0*abs(((sind(k*period*sind(theta))/k*period*sind(theta))*(sind(numel/2*k*sind(theta))/sind(0.5*k*period*sind(theta)))))
For now I am trying to implement the equation to have the plot like below. But this will only give a signle value. How can I implement the right equation to have the plot shown above.
댓글 수: 2
채택된 답변
Walter Roberson
2021년 6월 22일
%rectangular aperture array factor.
N = 150;
I_0 = 1;
lambda =1.55e-6;
k=(2*pi)/lambda;
period = 2e-6;
theta = linspace(-25,25,N);
numel=33;
I = I_0 .* abs(((sind(k .* period .* sind(theta)) ./ k .* period .* sind(theta)) .* (sind(numel ./ 2 .* k .* sind(theta)) ./ sind(0.5 .* k .* period .* sind(theta)))));
plot(theta, I)
As you increase N, you will get a denser and denser plot that is more and more unreadable. That is because you are plotting a high frequency signal.
댓글 수: 0
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Surface and Mesh Plots에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!