Analysis of a ridged circular disc microstrip antenna element using the cavity model

Author

Kashani, F.H. ; Mallahzadeh, A.R. ; Barkeshli, K.

Author_Institution

IUST, Tehran, Iran

Volume

148

Issue

3

fYear

2001

fDate

6/1/2001 12:00:00 AM

Firstpage

213

Lastpage

217

Abstract

A theoretical analysis of a ridged circular patch microstrip antenna element is presented by modelling it as a cylindrical cavity with a magnetic wall along its edge. The approach is based on conserving the reaction at the ridged position. This antenna, excited in the dominant mode, resonates at higher frequencies and has a wider bandwidth than a simple conventional circular patch antenna with the same size. Design graphs show the variation of the resonant frequency, quality factor, radiation efficiency, feeding position at resonance and bandwidth (VSWR ⩽2), for the dominant mode as a function of the ratio of inner to outer-disc radius for different ridge thicknesses

Keywords

Q-factor; antenna radiation patterns; antenna theory; cavity resonators; microstrip antennas; bandwidth; cavity model; circular patch antenna; cylindrical cavity; design graphs; dominant mode excitation; feeding position; inner to outer-disc radius ratio; magnetic wall; quality factor; radiation efficiency; resonant frequency; ridge thickness; ridged circular disc microstrip antenna element;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:20010423

Filename

942850