Computer Science – Performance
Scientific paper
Mar 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998itmtt..46..250t&link_type=abstract
IEEE Transactions on Microwave Theory and Techniques, vol. 46, p. 250
Computer Science
Performance
Radio Telescopes, Reflector Antennas, Antenna Design, Computer Aided Design, Gregorian Antennas, Antenna Radiation Patterns, Electrical Properties, Cross Polarization, Two Reflector Antennas, Parabolic Antennas
Scientific paper
This paper presents an evaluation of the electrical performance of the Green Bank Telescope (GBT) reflector antenna, operating as single- and dual-offset configurations, as well as a general overview of the GBT system. The GBT dual-offset Gregorian configuration is designed for low cross polarization (XPOL) using the dual-offset reflector antenna (DORA) synthesis package code. The procedure implemented in DORA to upgrade an existing main reflector to a low cross-polarized dual-offset Gregorian reflector antenna is also described. All computed patterns were obtained with the parabolic reflector analysis code (PRAC) program, and with the commercial code GRASP7. The GBT radiation patterns and performance values indicate that low XPOL performance can be achieved with a dual-offset configuration, provided that a low XPOL feed is used. The GBT configuration is employed as a case example for the aforementioned procedure.
Stutzman Warren L.
Terada Marco A. B.
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