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University of Oklahoma

1. Islam, Shajid. Probe-based, quasi-near-field phased array calibration.

Degree: PhD, 2020, University of Oklahoma

Phased array technology provides remarkable scanning flexibility and spatial search capability for the multifunction radar system, airborne radar system, and many other applications. Recent years have seen a noticeable surge towards low cost, small phased array antenna technology in a varied range of sectors due to its diverse applicability. However, lowering the cost exposed phased array antenna to various errors, among which excitation errors, such as incorrect phase and amplitude, is one of the major concerns. Excitation errors affect essential performance parameters such as side-lobe level, antenna gain, active impedance, and beam-forming quality. It is crucial to quantify and compensate for the errors associated with each antenna element's phase and amplitude to ensure the phased array antenna's desired performance. The process of this compensation is widely known as the calibration of a phased array. The diverse application and increased use of a low cost small phased array system make the front end calibration procedure very challenging. This challenge is two-fold. The calibration should be done accurately and quickly as possible. This dissertation focuses on developing a novel technique of phased array calibration using a fixed probe in the quasi-near-field of the antenna. The objective is to significantly reduce calibration time and associated cost without compromising the calibration quality for initial and in-situ calibration. After the development of a successful mathematical framework, a detailed simulation is conducted to analyze the system. The proposed technique was finally validated using an active electronically scanned array inside a custom-made compact range and near field range. Advisors/Committee Members: Fulton, Caleb (advisor), Yeary, Mark (committee member), Havlicek, Joseph (committee member), Sigmarsson, Hjalti (committee member), Chavez-Dominguez, Javier (committee member).

Subjects/Keywords: Phased Array Calibration; Fast Calibration Technique; Quasi-Near-Field; Mutual Coupling

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Islam, S. (2020). Probe-based, quasi-near-field phased array calibration. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/326668

Chicago Manual of Style (16th Edition):

Islam, Shajid. “Probe-based, quasi-near-field phased array calibration.” 2020. Doctoral Dissertation, University of Oklahoma. Accessed March 06, 2021. http://hdl.handle.net/11244/326668.

MLA Handbook (7th Edition):

Islam, Shajid. “Probe-based, quasi-near-field phased array calibration.” 2020. Web. 06 Mar 2021.

Vancouver:

Islam S. Probe-based, quasi-near-field phased array calibration. [Internet] [Doctoral dissertation]. University of Oklahoma; 2020. [cited 2021 Mar 06]. Available from: http://hdl.handle.net/11244/326668.

Council of Science Editors:

Islam S. Probe-based, quasi-near-field phased array calibration. [Doctoral Dissertation]. University of Oklahoma; 2020. Available from: http://hdl.handle.net/11244/326668

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