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Scattering effects of Space Station structure on Assembly/Contingency Subsystem (ACS) antenna performanceACS antenna patterns were computed using the Geometrical Theory of Diffraction (GTD) modeling technique in which the multipath interference from the Space Station structures was included. The accuracy of the numerical results obtained is verified by comparing them against a series of RF anechoic chamber measurements. Less than 1 dB degradation is expected if a +/- 15 deg cone is used to protect the ACS high gain antenna boresight pattern; a +/- 20 deg cone is required if no more than 0.5 dB gain degradation is desired.
Document ID
19920056011
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hwu, Shian U. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Lu, Ba P. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Johnson, Larry A. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Fournet, Jon S. (Lockheed Engineering and Sciences Co. Houston, TX, United States)
Panneton, Robert J. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Eggers, Donald S. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Arndt, G. D. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 15, 2013
Publication Date
March 1, 1992
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Report/Patent Number
AIAA PAPER 92-1538
Accession Number
92A38635
Distribution Limits
Public
Copyright
Other

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