Offset Dual-Reflector Antenna System Efficiency Predictions Including Subreflector Diffraction

Author

de Villiers, Dirk I. L.

Author_Institution

Dept. of Electr. & Electron. Eng., Stellenbosch Univ., Stellenbosch, South Africa

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

947

Lastpage

950

Abstract

A simple analytical formula for the prediction of diffraction efficiency in offset dual-reflector antenna systems is presented, and its performance evaluated by comparison to commercial software physical optics and method-of-moments simulations. The formula only requires knowledge of the symmetry plane physical configuration of the reflectors and an analytical approximation of the feed radiation pattern, and is therefore very straightforward to implement and use as a design aid. Some example applications of the formula are presented and discussed.

Keywords

antenna radiation patterns; method of moments; physical optics; reflector antenna feeds; commercial software physical optics; diffraction efficiency prediction; feed radiation pattern; method-of-moments simulations; offset dual-reflector antenna system efficiency predictions; subreflector diffraction; symmetry plane physical configuration; Apertures; Approximation methods; Diffraction; Feeds; Lighting; Diffraction; radio astronomy; reflector antennas;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2167490

Filename

6015528