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http://dx.doi.org/10.5515/KJKIEES.2008.19.4.451

Design of Offset Dual-Shaped Reflector Systems for Compact Antenna Test Range  

Noh, Sung-Min (Dept. of Electronic Engineering, Dankook University)
Choi, Hak-Keun (Dept. of Electronic Engineering, Dankook University)
Lim, Sung-Bin (Korean Aerospace Research Institute)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.19, no.4, 2008 , pp. 451-460 More about this Journal
Abstract
Gregorian offset dual-shaped reflector antennas have been widely used in the satellite communication systems for their high gain and low sidelobe characteristics. However, in this paper, it is designed as the CATR(Compact Antenna Test Range) reflector system, and its near-field characteristics are investigated. The CATR facility needs to provide an uniform plane wave with the minimum amplitude and phase ripple and the low cross polarization to the test region. Therefore, the reflector near-field patterns are calculated and presented with the variations of the aperture power distribution, the feed horn pattern, and the distance from the aperture to the test zone. Also, the offset dual-shaped reflector is fabricated at 30 GHz, and its near-field patterns are measured. The measured results are in good agreement with the calculated results. From theses results, we confirm that the designed offset dual-shaped reflector can be used as the reflector system for the compact antenna test range.
Keywords
CATR; Plane Wave; Near field; Gregorian; Reflector;
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