The wide-band matching area for a small antenna

Author

Wheeler, Harold A.

Author_Institution

Hazeltine Corporation, Greenlawn, NY, USA

Volume

Issue

fYear

1983

fDate

3/1/1983 12:00:00 AM

Firstpage

364

Lastpage

367

Abstract

A special frequency scale is proposed for use in describing the fundamental limitation on wide-band matching of a small antenna by means of a fixed reactive network. This scale is $u = - 1/\\omega ^{3}$ , normalized to unit frequency ( $\\omega _{1} = 1$ )-It has unit width for the high-pass band above this frequency. In terms of the familiar matching exponent $\\mu = \\ln 1/|\\rho|$ , the matching area over this scale is limited to $3 \\pi p_{1}$ , where $P_{1}$ is the (small) radiation power factor at $\\omega _{1}$ . The corresponding limit on matching efficiency is $6 \\pi p_{1}$ . A double-tuned matching network can approach $2/\\pi$ this area over any bandwidth on this scale.

Keywords

Antennas; Impedance-matching; Adaptive arrays; Bandwidth; Broadband antennas; Frequency; Impedance matching; Inductors; Loaded antennas; Power transmission lines; Reactive power; Transmission line antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.1983.1143030

Filename

1143030

Link To Document

https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1026658