Hello,
To create a transmit antenna array with different lambda values and shifted in the up direction, you can follow these steps:
1.Open a new MATLAB script or function and define the parameters of your antenna array. For example, you can define the number of elements in the array, the spacing between elements, and the wavelength of the signal.
2.Create a linear antenna array with the desired number of elements and spacing. You can use the "linearArray" function in the phased array toolbox to create this array.
3.Define the positions of the shifted elements in the array. To shift the elements in the up direction, you can add a positive offset to the y-coordinate of the element positions. For example, if you want to shift the elements by 0.5 lambda, you can add 0.5 times the element spacing to the y-coordinate of the positions.
4.Create a new antenna array object with the shifted element positions. You can use the "phased.CustomAntennaElement" function to create a custom antenna element with the desired position.
5.Combine the linear and shifted antenna arrays into a single array object using the "phased.ConformalArray" function. This function allows you to create an array with arbitrary element positions and orientations.
6.Set the direction of the main beam of the antenna array using the "phased.SteeringVector" function. This function allows you to specify the direction of the main beam using azimuth and elevation angles.
7.Generate a plot of the antenna array using the "pattern" function. This function generates a 3D plot of the radiation pattern of the antenna array.
Here is some sample code that demonstrates how to create a transmit antenna array with different lambda values and shifted in the up direction:
% Define the parameters of the antenna array
numElements = 8; % Number of elements in the array
elementSpacing = 0.5; % Spacing between elements in wavelengths
wavelength = 1; % Wavelength of the signal
% Create a linear antenna array
linearArray = phased.LinearArray('NumElements', numElements, 'ElementSpacing', elementSpacing);
% Define the positions of the shifted elements
shiftedPositions = linearArray.getElementPosition() + [0; 0.5*elementSpacing; 0];
% Create a custom antenna element with the shifted position
shiftedElement = phased.CustomAntennaElement('Position', shiftedPositions);
% Create a conformal array with the linear and shifted elements
conformalArray = phased.ConformalArray('ElementPosition', [linearArray.getElementPosition(), shiftedPositions],...
'Element', [linearArray.getElement(), shiftedElement]);
% Set the direction of the main beam of the array
azimuthAngle = 30; % Azimuth angle of the main beam in degrees
elevationAngle = 0; % Elevation angle of the main beam in degrees
steeringVector = phased.SteeringVector('SensorArray', conformalArray, 'PropagationSpeed', physconst('LightSpeed'));
conformalArray.ElementPhase = steeringVector(azimuthAngle, elevationAngle);
% Generate a plot of the radiation pattern of the array
pattern(conformalArray, wavelength, -180:180, 0, 'CoordinateSystem', 'polar');
This code creates a transmit antenna array with 8 elements, where the first 4 elements are arranged in a linear array with 2 lambda spacing and the last 4 elements are shifted up by 0.5 lambda. The direction of the main beam is set to 30 degrees azimuth and 0 degrees elevation, and a radiation pattern plot is generated.
You can also refer to this documentation for further assistance:Phased Array Design and Analysis - MATLAB & Simulink (mathworks.com)
Hope this Helps!
