A design procedure for classical offset dual reflector antennas with circular apertures

Author

Brown, Kenneth W. ; Prata, Aluizio, Jr.

Author_Institution

Dept. of Electr. Eng.-Electrophys., Univ. of Southern California, Los Angeles, CA, USA

Volume

42

Issue

8

fYear

1994

fDate

8/1/1994 12:00:00 AM

Firstpage

1145

Lastpage

1153

Abstract

A geometrical optics procedure for designing electrically optimized classical offset dual reflector antennas with circular apertures is presented. Equations are derived that allow the size and spacing of the main and subreflectors of the antenna system, along with the feed horn subintended angle, to be used as input variables of the design procedure. The procedure, together with these equations, yields an optimized design, starting from general system requirements. The procedure is demonstrated by designing both an offset Cassegrain and an offset Gregorian antenna, and is validated by analyzing their radiation patterns using physical optics surface current integration on both the main and subreflectors

Keywords

antenna radiation patterns; antenna testing; geometrical optics; optimisation; reflector antennas; antenna system; circular apertures; classical offset dual reflector antennas; design procedure; feed horn; geometrical optics procedure; offset Cassegrain antenna; offset Gregorian antenna; optimized design; physical optics surface current integration; radiation patterns; subintended angle; subreflectors; Antenna feeds; Aperture antennas; Design optimization; Equations; Geometrical optics; Horn antennas; Input variables; Optical design; Pattern analysis; Reflector antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.310006

Filename

310006