Analysis of one-dimensional zonal reflectors

Author

Guo, Y. Jay ; Barton, Stephen K.

Author_Institution

Dept. of Electr. & Electron. Eng., Bradford Univ., UK

Volume

43

Issue

4

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

385

Lastpage

389

Abstract

A one-dimensional zonal reflector is a conducting surface which is uniform in one direction and has a zonal profile in the other. Similar to a cylindrical reflector, it converts a cylindrical wave from a line-source into an outgoing plane wave. The radiation performance of such reflectors with TM-wave illumination is analyzed by the method of moments (MoM). The influence of corner diffraction and zoning on the sidelobe level is investigated. Three types of configurations are considered, which include the parabolic zonal reflector and two stepwise zonal reflectors of different configurations. It is found that corner diffraction makes a significant contribution to the sidelobe level, but zoning intrinsically raises the far-out sidelobes. Numerical results show that the near-in sidelobes of the stepwise zonal reflector can be significantly decreased by adjusting the geometrical configuration

Keywords

antenna radiation patterns; electromagnetic wave diffraction; method of moments; reflector antennas; zone plates; MoM; TM-wave illumination; conducting surface; corner diffraction; cylindrical reflector; cylindrical wave; far-out sidelobes; geometrical configuration; line-source; method of moments; near-in sidelobes; one-dimensional zonal reflectors; parabolic zonal reflector; plane wave; radiation performance; sidelobe level; stepwise zonal reflectors; zonal profile; zone plate reflector; zoning; Apertures; Costs; Diffraction; Lighting; Message-oriented middleware; Moment methods; Nonhomogeneous media; Optical surface waves; Performance analysis; Reflector antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.376036

Filename

376036