Lab: Base Station Antenna Design
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Lab: Base Station Antenna Design
Introduction:
In this lab you will use the Antenna Toolbox in Matlab to design a base station antenna that operates in the 790-960MHz. You will use the “Antenna Designer” and “Antenna Array Designer” Apps in the Antenna toolbox for this design task. A typical single band base station antenna such as “2P-2L-C1” in its simplest format has a column of dipoles backed by a ground plane. Each dipole is linearly polarised and either oriented as ±45 slant polarised or horizontal and vertically polarised as shown in the picture below. In a dual polarised arrangement, polarisations are orthogonal to each other, therefore can be used for spatial diversity or spatial multiplexing.
Figure 1 (a): Vertical polarised (b) slant polarised antenna array
Task:
You will be required to design a single polarised base station antenna that can achieve a minimum directivity of 16dBi on a 2.4mx0.5m (length x width) ground plane. Prepare a report (max 2 pages with either word or PDF format) and submit via the Canvas submission link (emails not accepted). Following table indicate the information that needs to be included in the report with marking criteria.
Marking rubric:
|
Item # |
Content |
Marks |
|
1 |
Figure of the linear array showing the dipole orientation and size of the antenna (Note: This can be obtained from the “Array” tab in the Antenna Array Designer tool. |
1 |
|
2 |
Antenna 3D radiation pattern at 870 MHz. Must indicate the antenna directivity. |
1 |
|
3 |
Elevation radiation pattern with correct dB scale (Max: 20dBi and Min: -30dBi) |
1 |
|
4 |
Listing of HPBW, FNBW, F/B and SLL on the elevation pattern. |
1 |
|
5 |
Figure of the scattering parameters for the array in 790-960MHz range |
1 |
|
|
Total |
5 |
Additional guidance:
Use of Antenna Designer
• Antenna Designer in matlab can be opened by typing “antennaDesigner” in the command window.
• Design a dipole with a rectangular metal back plane and observe the scattering parameters and pattern performance.
Antenna Array Designer (Required for the report)
• Type “antennaArrayDesigner” in the command window.
• Design a dipole array with multiple antenna elements in a linear arrangement and try to visualise the content required for the report.
• You may usehttps://au.mathworks.com/help/antenna/gs/design-and-analysis-using- antenna-array-designer-app.htmlexample to help you get familiarise with the tool.
2022-09-24