Alignment tolerances of antenna optics for KVN 21-m shaped cassegrain antenna

Author

Chung, Moon-Hee ; Byun, Do-Young ; Khaikin, Vladimir B.

Author_Institution

Korea Astron. & Space Sci. Inst., Yonsei Univ., Seoul

fYear

2007

fDate

2-9 Sept. 2007

Firstpage

186

Lastpage

187

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.

Keywords

antenna feeds; millimetre wave antennas; ray tracing; reflector antennas; KVN Cassegrain antenna; alignment tolerance; antenna optics; antenna system; frequency 22 GHz to 129 GHz; ray-tracing method; size 21 m; sub-reflector positioning; Antenna feeds; Aperture antennas; Geometrical optics; Millimeter wave technology; Optical fiber networks; Optical losses; Optical sensors; Optical surface waves; Ray tracing; Reflector antennas; alignment tolerance; antenna optics; ray tracing; shaped Cassegrain antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on

Conference_Location

Cardiff

Print_ISBN

978-1-4244-1438-3

Type

conf

DOI

10.1109/ICIMW.2007.4516452

Filename

4516452