Phased Array Simulation script

Hi I saw this phased array video by matlab

https://youtu.be/9WxWun0E-PM?si=GPxVMjpNA7bPBBz2

At 15:55, it simulated the different steering angles of antennas from -90 degrees to +90 degrees. However it doesn't show on the video how he did it.

Additionally, not only do I want to know how to do a script on steering angles, I also want to know how the pattern changes as each element(antenna) is being displaced on the x,y,z plane. Not just static like the video.

Answer 1

[Honglei Chen]

Here is a script to reproduce the animation

%% Parameters
fc = 300e6;
c = 3e8;
lambda = c / fc;
d = lambda / 2;
%% Create ULA
antenna = phased.IsotropicAntennaElement('FrequencyRange', [200e6 400e6],...
    'BackBaffled',true);
ura = phased.URA('Element', antenna, ...
    'Size', [8 8], ...
    'ElementSpacing', [d d]);
%% Steering Vector Object
sv = phased.SteeringVector('SensorArray', ura, 'PropagationSpeed', c);
%% Sweep Angles
sweepAngles = -60:2:60;
%% Animated 3D Pattern
figure('Position', [100 100 900 700]);
for idx = 1:length(sweepAngles)
    steerAz = sweepAngles(idx);
    w = sv(fc, [steerAz; 0]);
    clf;
    pattern(ura, fc, -180:1:180, -90:1:90, ...
        'PropagationSpeed', c, ...
        'Type', 'Powerdb', ...
        'Weights', w);
    title(sprintf('8x8 URA | Steering Angle = %+d°', steerAz));
    drawnow;
    pause(0.1);
end

If you want to adjust the element positions, depending on how much you want to do, you can either do a conformal array, or use perturbation analysis to see the effect of small position errors have on the array pattern.