Admittance correction factor for coaxially excited cylindrical antennas

Author

Williamson, Allan G.

Author_Institution

Dept. of Electr. & Electron. Eng., Auckland Univ., New Zealand

Volume

49

Issue

4

fYear

2001

fDate

4/1/2001 12:00:00 AM

Firstpage

640

Lastpage

644

Abstract

A long standing problem in antenna theory has been the accurate determination of the input admittance of coaxially excited antennas. While reasonably accurate results have been obtained for a range of problems using the so called “TEM approximation” for the coaxial aperture electric field, these results nonetheless contain an error of small but unknown extent. By examining the infinite coaxially excited antenna problem this approximation error has been quantified and a simple approximation factor has been deduced. This correction factor is applicable to a range of antenna problems having a coaxial source geometry

Keywords

antenna theory; current distribution; electric admittance; TEM approximation; admittance correction factor; antenna theory; approximation error; coaxial source geometry; coaxially excited cylindrical antennas; current distribution; infinite coaxially excited antenna problem; input admittance; Admittance; Antenna theory; Antennas and propagation; Aperture antennas; Approximation error; Coaxial components; Current distribution; Dielectrics; Geometry; Proposals;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.923326

Filename

923326