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Linear-phase approximation in the triangular facet near-field physical optics computer programAnalyses of reflector antenna surfaces use a computer program based on a discrete approximation of the radiation integral. The calculation replaces the actual surface with a triangular facet representation; the physical optics current is assumed to be constant over each facet. Described here is a method of calculation using linear-phase approximation of the surface currents of parabolas, ellipses, and shaped subreflectors and compares results with a previous program that used a constant-phase approximation of the triangular facets. The results show that the linear-phase approximation is a significant improvement over the constant-phase approximation, and enables computation of 100 to 1,000 lambda reflectors within a reasonable time on a Cray computer.
Document ID
19910002665
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Imbriale, W. A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hodges, R. E.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 6, 2013
Publication Date
August 15, 1990
Publication Information
Publication: The Telecommunications and Data Acquisition Report
Subject Category
Computer Programming And Software
Accession Number
91N11978
Funding Number(s)
PROJECT: RTOP 310-20-65-04-00
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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