Hi Thibaut,
To generate a 3D radiation pattern line-by-line in MATLAB, similar to the Sensor Array Analyzer app, you can use a combination of plotting techniques. The idea is to iterate over the azimuth and elevation angles, plotting each line individually. You can follow the below steps to do so:
- Iterate Over Angles: Loop through the azimuth and elevation angles to plot each line separately.
- Use Plot3: Instead of "surf", use "plot3" to draw lines representing the radiation pattern at each angle.
- Adjust Transparency and Color: Use properties like "LineWidth" and "Color" to adjust the appearance of each line.
Here's the MATLAB code to reflect the above steps:
% Example MATLAB code with assumed AF_magnitude_dBi
theta = linspace(0, pi, 180); % zenith angle
phi = linspace(-pi, pi, 360); % azimuth angle
[THETA, PHI] = meshgrid(theta, phi);
% Assume AF_magnitude_dBi as a simple cosine pattern for demonstration
AF_magnitude_dBi = 10 * abs(cos(THETA));
X = AF_magnitude_dBi .* sin(THETA) .* cos(PHI);
Y = AF_magnitude_dBi .* sin(THETA) .* sin(PHI);
Z = AF_magnitude_dBi .* cos(THETA);
figure;
hold on;
for i = 1:length(phi)
% Extract line data for a constant azimuth angle
x_line = X(i, :);
y_line = Y(i, :);
z_line = Z(i, :);
% Plot the line
plot3(x_line, y_line, z_line, 'LineWidth', 1.5, 'Color', [0, 0, 1, 0.5]); % Semi-transparent blue lines
end
% Optionally, loop through elevation angles for cross-section lines
for j = 1:length(theta)
% Extract line data for a constant elevation angle
x_line = X(:, j);
y_line = Y(:, j);
z_line = Z(:, j);
% Plot the line
plot3(x_line, y_line, z_line, 'LineWidth', 1.5, 'Color', [1, 0, 0, 0.5]); % Semi-transparent red lines
end
colorbar;
title('3D Radiation Pattern (Line-by-Line)');
xlabel('X');
ylabel('Y');
zlabel('Z');
grid on;
view(3);
hold off;
You may refer to the following MathWorks documentation links to have a better understanding on plot3 and meshgrid:
