I understand you want to rotate only selected elements of an antenna array in MATLAB. The “tilt” method on an array object rotates the entire array together, so it cannot be used for rotating individual elements.
A better approach is to use a “conformalArray”, which allows each element to be defined independently. With this, elements can differ not only in position, but also in orientation, type, and size. This gives flexibility to rotate only the elements you choose while keeping the others unchanged.
In MATLAB, each antenna element has “Tilt” and “TiltAxis” properties. By assigning these properties before adding the element to the “conformalArray”, you can rotate individual elements selectively. Elements without these properties remain unrotated.
Here is a simple approach:
- Define the antenna elements you want to use (dipoles, patches, etc.).
- Assign “Tilt” and “TiltAxis” individually to the elements that need rotation. Elements without these properties remain unrotated.
- Place the elements in the desired positions.
- Combine them into a “conformalArray” and visualize or analyze.
Example Code:
% Define frequency range
f = 900e6:10e6:1.1e9; % 900 MHz to 1.1 GHz in 10 MHz steps
% Design antennas at 1 GHz (the 11th element of f)
br = design(bowtieRounded,f(11));
br.Tilt = 45; % Tilt 1st element 45 degrees
br.TiltAxis = [1 0 0]; % Tilt around x-axis
bt = design(bowtieTriangular,f(11));
bt.Tilt = 90; % Tilt 2nd element 90 degrees
bt.TiltAxis = [0 1 0]; % Tilt around y-axis
db = design(dipoleBlade,f(11));
db.Tilt = 30; % Tilt 3rd element 30 degrees
db.TiltAxis = [0 0 1]; % Tilt around z-axis
lc = design(loopCircular,f(11)); % 4th element remains unrotated
% Create conformal array
c = conformalArray(Element={br bt db lc}, ...
ElementPosition=[0.2189 0.2318 0; 0 0 0.2; -0.1 0.4 0; 0.4 0.6 0], ...
Reference="origin");
% Visualize
figure('Color','w');
show(c)
title('Conformal Array with Individually Rotated Elements in Different Directions')
- Only selected elements are rotated.
- “conformalArray” allows you to combine elements with different tilts and positions.
For more information on “conformalArray”, please refer to the below documentation link:
I hope this helps!
