Shielding of single- and double-reflector earth station antennas: a near- and far-field approach

Author

Van Dooren, G. A J ; Govaerts, H.J.F.G.

Author_Institution

Fac. of Electr. Eng., Eindhoven Univ. of Technol., Netherlands

Volume

140

Issue

4

fYear

1993

fDate

8/1/1993 12:00:00 AM

Firstpage

309

Lastpage

314

Abstract

This paper describes the off-axis radiation pattern calculation of a Cassegrain antenna system with prescribed geometrical parameters, in the absence and presence of a (hypothetical) half-plane obstacle located either in the near or far field of the antenna. The attenuation caused by the obstacle as a function of antenna orientation and position is calculated and presented. The results for the halfplane shielding of the double-reflector system are compared with those obtained for a single-reflector antenna system shielded by the same obstacle. Three different, but related, approaches for calculating the additional propagation loss are presented and compared. It is found that the proposed near-field approach gives the best overall results

Keywords

antenna radiation patterns; reflector antennas; satellite antennas; satellite ground stations; shielding; Cassegrain antenna; antenna orientation; attenuation; double-reflector system; earth station antennas; far-field approach; half-plane obstacle; halfplane shielding; near-field approach; off-axis radiation pattern; propagation loss; single-reflector antenna system;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings H

Publisher

iet

ISSN

0950-107X

Type

jour

Filename

232523