Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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GAIN DEGRADATION OF KVN 21-M SHAPED CASSEGRAIN ANTENNA DUE TO MISALIGNMENT OF ANTENNA OPTICS

  • Chung Moon-Hee (Radio Astronomy Division, KASI) ;
  • Byun, Do-Young (Radio Astronomy Division, KASI) ;
  • Khaikin Vladimir B. (The Special Astrophysical Observatory of RAS)
  • Published : 2006.12.10
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Abstract

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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References

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Cited by

  1. Analysis of KVN 21m Radio Antenna Optics using Ray-Tracing Method vol.26, pp.2, 2009, https://doi.org/10.5140/JASS.2009.26.2.187
  2. 100-GHZ BAND TEST OBSERVATIONS OF THE KVN 21-M RADIO TELESCOPES vol.44, pp.3, 2011, https://doi.org/10.5303/JKAS.2011.44.3.81