Physics – Optics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991tdar.nasa..283s&link_type=abstract
In its The Telecommunications and Data Acquisition Report p 283-297 (SEE N91-32250 24-32)
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.
Alvarez Leon S.
Britcliffe Michael J.
Franco Mariano
Otoshi Tom Y.
Slobin Stephen D.
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