Dual-reflector system with a spherical main reflector and shaped subreflector for compact range

Author

Chang, D.-C. ; Yang, C.-C. ; Yang, S.-Y.

Author_Institution

Electron. Syst. Div., Chung Shan Inst. of Sci. & Technol., Lung-Tan, Taiwan

Volume

144

Issue

2

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

97

Lastpage

102

Abstract

For many years, the compact range has successfully been used to evaluate antenna electromagnetic radiation and target scattering. Single offset paraboloidal reflectors, dual parabolic-cylindrical reflectors, and dual shaped reflectors exist for the compact-range reflector systems. A dual-reflector compact-range system with a spherical main reflector and a shaped subreflector is described with this design, an arbitrary position of the feed is permissible for the anechoic-chamber size and existing chamber-fitting considerations. A spherical surface is adopted to reduce manufacturing cost. A Gregorian-type dual-reflector system with a 1.83 m-diameter truncated spherical main reflector has been evaluated and manufactured. The test results, for frequencies from 8 to 39.5 GHz, showed that the performance of the quiet zone is within ±0.4 dB amplitude ripple and ±5° phase ripple over a 70% area of the main reflector projected in the quiet-zone direction

Keywords

anechoic chambers; antenna radiation patterns; antenna testing; microwave antennas; millimetre wave antennas; offset reflector antennas; 8 to 39.5 GHz; Gregorian-type dual-reflector system; amplitude ripple; anechoic-chamber size; antenna electromagnetic radiation; chamber-fitting considerations; compact range; design; feed position; performance; phase ripple; quiet zone; shaped subreflector; spherical main reflector; target scattering; truncated spherical main reflector;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:19970832

Filename

587442