Space Station UCS antenna pattern computation and measurementThe purpose of this paper is to analyze the interference to the Space Station Ultrahigh Frequency (UHF) Communication Subsystem (UCS) antenna radiation pattern due to its environment - Space Station. A hybrid Computational Electromagnetics (CEM) technique was applied in this study. The antenna was modeled using the Method of Moments (MOM) and the radiation patterns were computed using the Uniform Geometrical Theory of Diffraction (GTD) in which the effects of the reflected and diffracted fields from surfaces, edges, and vertices of the Space Station structures were included. In order to validate the CEM techniques, and to provide confidence in the computer-generated results, a comparison with experimental measurements was made for a 1/15 scale Space Station mockup. Based on the results accomplished, good agreement on experimental and computed results was obtained. The computed results using the CEM techniques for the Space Station UCS antenna pattern predictions have been validated.
Document ID
19940034857
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 & Sciences Co. Houston, TX, United States)
Panneton, Robert J. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Ngo, John D. (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 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: In: AIAA Computing in Aerospace Conference, 9th, San Diego, CA, Oct. 19-21, 1993, Technical Papers. Pt. 2 (A94-11401 01-62)
Publisher: American Institute of Aeronautics and Astronautics
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking