Efficiency measurement techniques for calibration of a prototype 34-meter-diameter beam-waveguide antenna at 8.45 and 32 GHz

Details Efficiency measurement techniques for calibration of a prototype 34-meter-diameter beam-waveguide antenna at 8.45 and 32 GHz Efficiency measurement techniques for calibration of a prototype 34-meter-diameter beam-waveguide antenna at 8.45 and 32 GHz

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992itmtt..40.1301s&link_type=abstract

IEEE Transactions on Microwave Theory and Techniques (ISSN 0018-9480), vol. 40, no. 6, June 1992, p. 1301-1309. Previously annou

Physics

Optics

Beam Waveguides, Calibrating, Deep Space, Satellite Networks, Space Communication, Waveguide Antennas, Antenna Arrays, Boresights, Cassegrain Optics, Elevation Angle, Quasars, Radio Astronomy, Superhigh Frequencies, Venus (Planet)

Scientific paper

Efficiency measurements at 8.45 and 32 GHz (X and Ka bands, respectively) were carried out on the new 34 m diameter beam waveguide antenna now in use at the NASA Goldstone Deep Space Communications Complex. The use of portable test packages enabled measurements at both the Cassegrain and beam waveguide focal points. Radio sources (quasars and Venus) were used as calibrators, and updated determinations of flux and source size correction were made during the period of the measurements. Gain and efficiency determinations as a function of elevation angle are presented, and the effects of the beam waveguide system and antenna structure are clearly seen. At the beam waveguide focus, an 8.45 GHz peak efficiency of 72.38 pct was measured; at 32 GHz, 44.89 pct was measured.

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