Gain Degradation of KVN 21-m Shaped Cassegrain Antenna due to Misalignment of Antenna Optics

Details Gain Degradation of KVN 21-m Shaped Cassegrain Antenna due to Misalignment of Antenna Optics Gain Degradation of KVN 21-m Shaped Cassegrain Antenna due to Misalignment of Antenna Optics

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jass...23..327c&link_type=abstract

Journal of Astronomy and Space Sciences. Vol. 23, no. 4, 327-336

Physics

Optics

1

Ray Tracing, Antenna Optics, Shaped Cassegrain Antenna, Alignment Tolerance

Scientific paper

In this paper, gain loss of KVN (Korean VLBI Network) 21-m shaped Cassegrain antenna due to misalignment of antenna optics is calculated using ray-tracing method. It enables us to estimate alignment tolerances of feed and sub-reflector positioning. According to numerical results, KVN 21-m shaped Cassegrain antenna's gain loss is more sensitive to positions of feed and sub-reflector than in case of the equivalent classical Cassegrain antenna. The result of calculation is believed to be utilized as a possible guideline when checking the performance of the antenna system.

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