Keywords
Antenna array mutual coupling, electromagnetic interference, radio astronomy
Abstract
A focal plane array feed of electrically small elements has been proposed as a means for achieving high sensitivity for radio astronomy applications in the presence of radio frequency interference (RFI). For a broadband system, mutual coupling effects become significant as the array element spacing becomes small relative to the electromagnetic wavelength. We present a theoretical framework for modeling the effects of mutual coupling and for determining the optimal multiport matching network between array elements and front-end transistor low-noise amplifiers for maximum signal-to-noise ratio (SNR). Numerical results are given for a model scenario including spillover and amplifier thermal noise and point signal and interference sources. A suboptimal self-impedance matching network yields performance close to that of a full network match.
Original Publication Citation
Warnick, K. F., and M. A. Jensen. "Effects of Mutual Coupling on Interference Mitigation with a Focal Plane Array." Antennas and Propagation, IEEE Transactions on 53.8 (25): 249-8
BYU ScholarsArchive Citation
Jensen, Michael A. and Warnick, Karl F., "Effects of mutual coupling on interference mitigation with a focal plane array" (2005). Faculty Publications. 355.
https://scholarsarchive.byu.edu/facpub/355
Document Type
Peer-Reviewed Article
Publication Date
2005-08-01
Permanent URL
http://hdl.lib.byu.edu/1877/1042
Publisher
IEEE
Language
English
College
Ira A. Fulton College of Engineering and Technology
Department
Electrical and Computer Engineering
Copyright Status
© 2005 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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