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Realizable feed-element patterns and optimum aperture efficiency in multibeam antenna systemsThe results of an earlier paper by Rahmat-Samii et al. (1981), regarding realizable patterns from feed elements that are part of an array that feeds a reflector antenna, are extended. The earlier paper used a cos exp q theta model for the element radiation pattern, whereas here a parametric study is performed, using a model that assumes a central beam of cos exp q theta shape, with a constant sidelobe level outside the central beam. Realizable q-values are constrained by the maximum directivity based on feed element area. The optimum aperture efficiency (excluding array feed network losses) in an array-reflector system is evaluated as a function of element spacing using this model as well as the model of the earlier paper. Experimental data for tapered slot antenna (TSA) arrays are in agreement with the conclusions based on the model.
Document ID
19890035099
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Yngvesson, K. S.
(Massachusetts, University Amherst, United States)
Rahmat-Samii, Y.
(California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Johansson, J. F.
(Massachusetts Univ. Amherst, MA, United States)
Kim, Y. S.
(Massachusetts Univ. Amherst, MA, United States)
Date Acquired
August 14, 2013
Publication Date
November 1, 1988
Publication Information
Publication: IEEE Transactions on Antennas and Propagation
Volume: 36
ISSN: 0018-926X
Subject Category
Communications And Radar
Accession Number
89A22470
Funding Number(s)
CONTRACT_GRANT: NAS1-18310
Distribution Limits
Public
Copyright
Other

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