Radiation pattern control by subreflector shaping in a dual-reflector antenna

✍ Scribed by J. R. Bergmann; L. C. Palma Pereira

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 208 KB
• Volume: 35
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.10621

✦ Synopsis

Abstract

Dual‐shaped reflector antennas have applications in satellite communications systems in which the highest antenna gain and stringent specifications on cross‐polarization are required. For antennas fed by a single feed, the radiation pattern control is obtained either by shaping one of the reflectors or by simultaneously shaping both reflector surfaces. In this paper, we explore the design of Gregorian configurations where the main reflector is an offset paraboloid and the subreflector is shaped so as to attain the coverage specifications. By considering the specifications for a high‐efficiency ground‐station antenna and a contoured beam antenna, two design examples are presented. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 408–412, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10621