Numerical modeling of impedance loaded multi-arm Archimedean spiral antennas

Author

Champagne, Nathan J., II ; Williams, Jeffery T. ; Sharpe, Robert M. ; Hwu, Shian-Uei ; Wilton, Donald R.

Author_Institution

Dept. of Electr. Eng., Houston Univ., TX, USA

Volume

40

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

102

Lastpage

108

Abstract

A method of moments formulation for the current on arbitrarily shaped thin wires is applied to the problem of radiation and scattering from Archimedean spiral antennas. This formulation includes impedance loading along the wires. Additional analysis is performed to take advantage of structures which exhibit discrete rotational symmetry. Numerical results for a four-arm Archimedean spiral antenna with and without impedance loading are compared, showing that the loading significantly affects the current distribution and the far-field pattern for the higher order modes

Keywords

antenna radiation patterns; antenna theory; current distribution; numerical analysis; Archimedean spiral antennas; arbitrarily shaped thin wires; current distribution; discrete rotational symmetry; far-field pattern; four-arm antenna; impedance loading; method of moments; multi-arm spiral antennas; numerical modelling; radiation; scattering; Current distribution; Impedance; Load modeling; Loaded antennas; Moment methods; Numerical models; Performance analysis; Scattering; Spirals; Wires;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.123365

Filename

123365