"Design and Characterization of Phased Arrays for UAS Detection and Tra" by David Buck

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

Ira A. Fulton College of Engineering and Technology; 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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