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Rapid Test Method for Multi-Beam Profile of Phased Array Antennas.

Qingchun Luo¹, Yantao Zhou¹, Yihong Qi²

¹Department of Electrical and Information Engineering, Hunan University, Changsha 410082, China.

Sensors (Basel, Switzerland)

|January 11, 2022

Summary

Measuring phased array antennas (PAAs) is time-consuming. This study introduces a pattern reconstruction method to significantly reduce PAA testing time by over 10x, improving efficiency and lowering costs.

Keywords:

antenna test method fast test method multi-beam pattern pattern reconstruction phased array antenna

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Area of Science:

Electromagnetics and Antenna Theory
Microwave Engineering
Signal Processing

Background:

Traditional phased array antenna (PAA) measurement is inefficient due to multi-beam patterns requiring individual testing.
Existing methods fail to meet the cost and time demands of modern PAA development.
The complexity of PAA measurements necessitates innovative solutions for efficient characterization.

Purpose of the Study:

To propose and validate a novel pattern reconstruction method for multi-beam PAAs.
To significantly reduce the measurement time and cost associated with PAA characterization.
To enable accurate prediction of beam patterns using a reduced measurement set.

Main Methods:

Theoretical derivation of a pattern reconstruction algorithm based on known array element patterns (AEP) and weighted port excitations.
Calculation of element excitation coefficients, accounting for matching, mutual coupling, and manufacturing variations.
Experimental validation of the reconstruction method across a large scanning range.

Main Results:

The proposed method accurately reconstructs beam patterns, including beam pointing accuracy, side lobe levels, and co-polar/cross-polar characteristics.
Measurement efficiency for PAAs is improved by a factor of 10 or more.
Low reconstruction error was observed even for large scanning angles.

Conclusions:

The developed pattern reconstruction method offers a highly effective solution for efficient multi-beam PAA testing.
This approach significantly enhances testing throughput, meeting the demands of advanced antenna systems.
The validated method provides a practical and cost-effective alternative to traditional PAA measurement techniques.