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NASA ACTS Multibeam Antenna (MBA) SystemThe design of the Advanced Communications Technology Satellite MBA system, which provides both spot beam and scanning beam coverage to both high and low burst rates data-users is examined. The MBA consists of receive and transmit antennas installed on a common precision mounting platform that is integrated to the bus through three flexures; a lightweight system with low thermal distortion is obtained by using composite materials for the MBA structures. The RF design, which is a Cassegrain reflector with a large equivalent focal length/aperture size, is described. Consideration is given to the position of the feed in order to minimize scan loss and sidelobe levels, the size of the subreflector in order to minimize feed spillover, and antenna performance degradation caused by reflector surface distortion. Breadbroad model test result reveal that the maximum sidelobe level outside the 2.5 HPBW region is -30 dB or lower relative to the power.
Document ID
19870053097
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Choung, Youn H.
(TRW Electronic Systems Group Redondo Beach, CA, United States)
Stiles, W. Herschel
(TRW Electronic Systems Group Redondo Beach, CA, United States)
Wu, Joseph
(TRW Electronic Systems Group Redondo Beach, CA, United States)
Wong, William C.
(TRW Electronic Systems Group Redondo Beach, CA, United States)
Chen, C. Harry
(TRW Electronic Systems Group Redondo Beach, CA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Subject Category
Spacecraft Instrumentation
Accession Number
87A40371
Distribution Limits
Public
Copyright
Other

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