Theoretical and experimental study of a cavity-backed annular-slot antenna

Author

Nikolic, N. ; Kot, J.S. ; Bird, T.S.

Author_Institution

CSIRO, Epping, NSW, Australia

Volume

144

Issue

5

fYear

1997

fDate

10/1/1997 12:00:00 AM

Firstpage

337

Lastpage

340

Abstract

A simple and accurate analysis of an annular-slot antenna backed by an inhomogeneously filled cavity is described. The analysis is based on a magnetic-field integral equation, which is solved approximately using a variational formulation. The results obtained from the analysis are compared with experimental measurements on a 5 GHz annular-slot antenna fabricated on a Duroid 5880 substrate. It is found that only three terms of a series expansion are needed for an accurate solution. Measured results for input impedance and far-field radiation patterns for an annular slot backed by different-sized cavities are presented

Keywords

antenna radiation patterns; integral equations; magnetic fields; microwave antennas; series (mathematics); slot antennas; variational techniques; 5 GHz; Duroid 5880 substrate; SHF; cavity backed annular slot antenna; experimental measurements; experimental study; far-field radiation patterns; inhomogeneously filled cavity; input impedance; magnetic field integral equation; measured results; series expansion; theoretical study; variational formulation;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:19971188

Filename

667508