Current distribution and input admittance of an infinite cylindrical antenna in anisotropic plasma

Author

Lee, S.W. ; Lo, Y.T.

Author_Institution

University of Illinois, Urbana, Illinois, USA

Volume

15

Issue

2

fYear

1967

fDate

3/1/1967 12:00:00 AM

Firstpage

244

Lastpage

252

Abstract

The current distribution and input admittance of an infinitely long cylindrical antenna driven by a slice generator and immersed in an anisotropic plasma are investigated. The applied dc magnetic field is along the axis of the antenna. By superimposing the characteristic waves guided along the antenna, the current solution is obtained in the form of a one-dimensional integral, which is examined both analytically and numerically. When $K_{\\perp } > 0$ , the magnitude of the current decays slowly with the distance from the source, and its phase is nearly linear with a "propagation constant" equal to $\\sqrt {K_{\\perp }}k_{0}$ for an antenna with very small radius. When $K_{\\perp } < 0$ , the magnitude of the current decreases rapidly away from the source, and its phase is no longer linear. The input admittance decreases with the radius of the antenna.

Keywords

Cylindrical antennas; Electromagnetic propagation in anisotropic media; Plasma-covered antennas; Admittance; Anisotropic magnetoresistance; Antennas and propagation; Current distribution; Dipole antennas; Electromagnetic radiation; Impedance; Plasma properties; Plasma sources; Plasma waves;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.1967.1138871

Filename

1138871