Design, visualize, and analyze arrays
The Array Designer app lets you design, visualize, and analyze arrays in the Antenna Toolbox™ library interactively.
Using this app, you can:
Show different array configurations and layouts defining element spacing.
Compare different array types and responses.
Pick array configuration to meet specific peek gain, directivity, desired coverage, pattern, port parameters.
Change the spacing between the elements and see the effect on the performance of the array.
Visualize the effect of mutual coupling at the port and in the far-field.
Optimize the antenna array elements using objective functions, design variables, and constraints.
MATLAB® Toolstrip: On the Apps tab, under Signal Processing and Communications, click the app icon.
MATLAB command prompt: Enter
The antenna array designer app opens a new blank canvas:
Select and Visualize an Array
Click in the canvas toolstrip to choose the type of array you want to analyze.
The default is a rectangular array with dipole antennas.
Using the toolstrip, you can choose different types of array layouts, antennas, and backing structures.
You can also specify the Design Frequency of the antenna or array. Setting this value scales the individual array elements to resonate at the specified frequency and places the elements at optimal location in the array to avoid interferences.
Click Accept to analyze the array characteristics.
You can select an
Array Type from the Array Gallery, and you can choose from different antennas from the Antenna Gallery.
You can choose different types of antennas from the Antenna Gallery.
You can also choose different types of backing structures for your antenna array elements from the Backing Structure Gallery.
Once you have clicked Accept on a design, you can specify the Frequency Range in the Input pane. Then plot the impedance, correlation, or S-parameters of the array using the corresponding buttons in the Coupling pane.
You can visualize the 3-D Pattern, AZ Pattern, or EL Pattern of the full array or an embedded element using the corresponding buttons in the Pattern pane. You can also add dielectric substrates to the individual elements or change the value and location of the load using the Properties pane.
Use Properties to manually change the properties of the array or its individual elements.
Use Export to view your array in MATLAB workspace or MATLAB script.
Open the Antenna Array Designer app.
Click on New and from the Array Type pane, click Linear.
In the bottom left corner, change Number of Elements to
5. Click Accept.
In the Properties pane, expand dipole-Geometry and change the Tilt(deg) to
30. This changes the tilt of each dipole element in the array to 30 degrees. Click on Array tab to view the array.
In the Properties pane, expand linear-Geometry and change the Tilt(deg) to
45. This changes the tilt of the entire array to 45 degrees.
On the Input pane, change the Center Frequency
60 MHz. Click 3D Pattern in the Pattern pane to plot the radiation pattern. Observe the maximum directivity of the array.
Open Antenna Array Designer app. In the Array Gallery pane, click Conformal.
The default conformal array consists of a dipole antenna and a bowtie antenna.
You can view each element separately by clicking on the element in the
Meander Antenna with Rectangular Backing
Add a meander dipole antenna with rectangular backing. From the ANTENNA GALLERY, click Meander to create a meander dipole antenna. Move the antenna by dragging the antenna in the Layout window.
To add the rectangular backing:
Choose the meander dipole antenna from the Layout window and then click Rectangular in the BACKING STRUCTURE GALLERY
Right click on the antenna in the Layout window and select Add Backing > Rectangular Reflector.
Delete Meander and Add V-Dipole
To delete the meander dipole antenna, right click from the Layout window, and select Delete.
Click Vee from the Antenna Gallery to add a V-dipole antenna.
Place the antennas at the following locations in the X-Y-Z plane:
Element 1 - dipole - [1 0 0]
Element 2 - bowtie - [0 1 0]
Element 3 - V-dipole - [0 0 1]
In the Properties pane, expand conformalArray - Geometry and change the values of ElementPosition(m) to [1 0 0;0 1 0;0 0 1]. Click Apply.
Embedded Element Pattern and Half-Power Beam Width (HPBW)
Show the embedded element pattern in the azimuth plane for element 2. Choose Embedded Element in the PATTERN pane
. Click AZ Pattern. From the element selection window, click element 2 and then OK.
To view the HPBW, right click on the azimuth pattern and select Measurements > Antenna Metrics.
Coupling Between Elements
To observe the coupling between elements 1 and 3, make sure that the Enable Coupling is selected in the INPUT pane. In the COUPLING, click
Correlation. From the element selection window, click 1 and 3.
Open the Antenna Array Designer app. In the Array Gallery section, select the array type as Linear.
Select Dipole from Antenna Gallery. Select No Backing under the Backing Structure Gallery. Specify the design frequency as 2.4 GHz. In Layout pane, specify the Number of Elements as 4 and click Accept under the Close section.
Select 3D Pattern under Pattern section to calculate the 3-D radiation pattern.
The gain is 9.1 dBi. Click Optimize on the app toolstrip to optimize this array.
On the Optimizer tab, click Maximize Gain in the Objective Function section. In the Design Variables pane, select the variables you want to optimize. For the purpose of this example, select the Element Spacing variable, set the lower and upper bounds as 0.06 and 0.09.
Click the Constraints pane. In this example, Constraint Functions are not selected. If your application requires constraints, chosen one or more constraint functions from the dropdown. You can use the Add and Remove buttons to add or remove constraints.
Click Apply to apply the design variables in this example. In the Settings section, set the number of iterations to
50, select Parallel Computing if you have Parallel Computing Toolbox™, and click Run.
Once the simulation is complete, the optimization results are displayed in the Results pane
Click Accept. In the Pattern section, select 3D Pattern as the pattern to display the optimized array design. The optimized gain has now increased to 10.7 dBi.
antennaArrayDesigner opens the Array Designer app,
enabling you to design and analyze antenna arrays using the Antenna Toolbox