Design and Analysis Using Antenna Designer
This example shows how to construct, visualize, and analyze a helix antenna element using the Antenna Designer App.
Open Antenna Designer App
To open the app, at the
MATLAB command prompt, enter:
This command opens a blank canvas.
Design Helix Antenna
In the blank canvas, click NEW. In the ANTENNA GALLERY, under HELIX FAMILY, select a helix antenna. Set the Design Frequency to 1.8 GHz.
To analyze the helix antenna, click Accept.
Change Helix Antenna Properties
In the Antenna Properties tab, change the following:
Radius = 0.0280
Width = 0.0012
Turns = 4
Spacing = 0.0350
GroundPlaneRadius = 0.0750
Click Apply to see the change in the helix antenna structure.
Plot Impedance and S-Parameters
Open the Load-helix section and change the Impedance of the antenna to
72 ohms. Click Apply. In the toolstrip, under INPUT tab, change the Frequency Range to
Click Impedance to plot the impedance of the helix antenna. Click S Parameter to plot the S11 value of the helix antenna. Click Tile to view the plots together.
Plot Current Distribution, 3-D, Azimuth, and Elevation Patterns
In the SCALAR FREQUENCY ANALYSIS section of the toolstrip, click Current to view the current distribution of the helix at 1.8 GHz.
Click 3D Pattern, AZ Pattern, and EL Pattern to view the radiation, azimuth, and elevation patterns of the helix antenna, respectively. Click Tile again to view all the plots together.
You can compare the results of this tutorial with the results of
Antenna Modeling and Analysis tutorial: Antenna Modeling and Analysis
Export to MATLAB Workspace
Click the Export button arrow and then click Export to workspace. In the Export to workspace window, type the name of the antenna file. Click on the variable in the workspace to view the properties of the helix antenna.
Export to MATLAB Script
Click the Export button arrow again and then click Export to script to view the helix antenna and analysis in MATLAB script format. The script has two sections: Antenna Properties and Antenna Analysis.