Abstract

This work continues the development of phased array radar for UAS detection and tracking. The earlier 1D scanning, 4 channel BYU SAA radar is improved upon and replicated to form a network of radars. These are shown to work together for higher level tracking across multiple fields of view. Additionally, a new phased array instrument is designed and constructed with 16 channels, 2D scanning, and improved signal processing algorithms. Preliminary metrics and field results show the operation of this sensor. A new technique for measuring array mutual impedances from embedded element patterns is developed here. This technique uses an antenna range instead of a network analyzer. New mathematical relationships are built to handle cases for practical measurements and field transformations. Demonstration of this method with a 2x2 uniform rectangular array is shown and compares favorably with the mutual impedances traditionally measured with a network analyzer. A new way to measure radiation efficiency using the antenna Y factor method is demonstrated. This method does not require an expensive field measurement chamber and can be done with a simple ground shield and absorber foam. Various X band antennas have their radiation efficiency characterized and compare favorable with known efficiencies.

Degree

PhD

College and Department

Electrical and Computer Engineering

Rights

https://lib.byu.edu/about/copyright/

Date Submitted

2022-08-02

Document Type

Dissertation

Handle

http://hdl.lib.byu.edu/1877/etd12546

Keywords

phased arrays, radar, UAS detection, digital beamforming, mutual coupling, embedded element patterns, radiation efficiency, Y factor

Language

english

Included in

Engineering Commons

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