Mode-matching analysis of top-hat monopole antennas loaded with radially layered dielectric

Author

Francavilla, Laura A. ; McLean, James S. ; Foltz, Heinrich D. ; Crook, Gentry E.

Author_Institution

Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA

Volume

47

Issue

1

fYear

1999

fDate

1/1/1999 12:00:00 AM

Firstpage

179

Lastpage

185

Abstract

A top-hat monopole antenna with homogeneous or inhomogeneous dielectric loading over a ground plane is considered. Mode-matching analysis with proper enforcement of edge conditions is applied to the problem. The results of this technique are verified through independent calculations of admittance as well as by comparison of fields across matching regions. Measurements were also taken for comparison with the results from the model. It is shown that dielectric loading can reduce the electrical size necessary for self resonance, but only at the expense of a large increase in radiation Q

Keywords

Q-factor; dielectric-loaded antennas; electric admittance; electric fields; magnetic fields; modal analysis; mode matching; monopole antennas; admittance; antenna measurements; dielectric loading; edge conditions; electric field expansion; electrical size reduction; ground plane; homogeneous dielectric loading; inhomogeneous dielectric loading; input impedance; loaded top-hat monopole antennas; magnetic field expansion; matching regions; measurements; mode-matching analysis; radially layered dielectric; radiation Q; self resonance; Antenna measurements; Current distribution; Cutoff frequency; Dielectric materials; Geometry; Impedance; Loaded antennas; Magnetic field measurement; Magnetic materials; Resonance;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.753008

Filename

753008