Broadband characteristics of capacitively loaded monopole antennas

Author

Yegin, K. ; Martin, A.Q.

Author_Institution

Dept. of Electr. & Comput. Eng., Clemson Univ., SC, USA

Volume

3

fYear

1996

fDate

21-26 July 1996

Firstpage

1578

Abstract

The narrowband frequency characteristics of straight-wire antennas can be overcome by proper loading of the antenna. The bandwidth characteristics of the loaded antennas are investigated through an optimization routine. A bandwidth ratio of 7.58:1 is achieved with a 0.75 meter long capacitively loaded antenna and a simple matching network. The current distribution of the antenna is determined numerically by the method of moments (MoM). The input impedance can then be calculated easily with the knowledge of the excitation voltage across the terminals of the antenna.

Keywords

capacitance; current distribution; electric impedance; impedance matching; method of moments; monopole antennas; optimisation; wire antennas; 0.75 m; MoM; antenna loading; bandwidth characteristics; bandwidth ratio; broadband characteristics; capacitively loaded monopole antennas; current distribution; excitation voltage; input impedance; matching network; method of moments; optimization routine; straight wire antennas; Bandwidth; Broadband antennas; Current distribution; Loaded antennas; Message-oriented middleware; Moment methods; Narrowband; Resonance; Resonant frequency; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1996. AP-S. Digest

Conference_Location

Baltimore, MD, USA

Print_ISBN

0-7803-3216-4

Type

conf

DOI

10.1109/APS.1996.549900

Filename

549900