Title :
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
fDate :
10/1/1997 12:00:00 AM
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;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings
DOI :
10.1049/ip-map:19971188
