NASA NTRS · 19890000050
Multiple-Beam Communications Antenna
Abstract
System has both fixed-spot and scanning coverage. Advanced offset-fed spacecraft antenna systems operating in 30/20 GHz frequency bands developed to provide multiple-radiating fixed-spot and regional-coverage scanning beams for use on communications satellites. Operating at higher frequencies, provides alternate frequency bands for expansion of existing satellite services and achieving frequency reuse capability for conservation of frequency spectrum. 20-GHz transmitting antenna is offset-fed, dual-reflector configuration. 30-GHz receiving antenna has orthogonal polarized feeds, hyperbolic reflectors, and two subreflectors.
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Myhre, R. W., Roberts, T. E., Wong, W. C.. 1989-02-01. Multiple-Beam Communications Antenna. https://ntrs.nasa.gov/citations/19890000050
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