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On the reflectivity of complex mesh surfacesPoorer than expected surface reflectivity was observed in an early Tracking and Data Relay Satellite System antenna utilizing a tricot mesh weave. This poor reflectivity was determined to be caused by inadequate electrical contact at wire crossover points. A proper mathematical and numerical approach to assess the impact of wire junctions on reflectivity performance is developed. A mathematical method is presented for computing the surface reflectivity of complex mesh configurations like those on unfurlable-type spacecraft antennas. The method is based on the Floquet mode expansion to establish an integral equation for mesh wire currents. The equation is solved using the method of moments with triangular basis functions. It is observed that it is necessary to give special attention to the junction treatment among different branches of the mesh configurations. A vector junction current approach that resulted in satisfactory solutions for the current is described. The results of numerical simulations are compared against measured data and excellent agreement is observed.
Document ID
19920033686
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Imbriale, William A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Galindo-Israel, Victor
(JPL Pasadena, CA, United States)
Rahmat-Samii, Yahya
(California, University Los Angeles, United States)
Date Acquired
August 15, 2013
Publication Date
September 1, 1991
Publication Information
Publication: IEEE Transactions on Antennas and Propagation
Volume: 39
ISSN: 0018-926X
Subject Category
Electronics And Electrical Engineering
Accession Number
92A16310
Distribution Limits
Public
Copyright
Other

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