Radiation characteristics of an insulated antenna in an arbitrary homogeneous medium

Author

Ghods, A.H. ; Rahmat-Samii, Y.

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

fYear

1991

fDate

24-28 June 1991

Firstpage

1324

Abstract

An insulator dipole with axisymmetric geometry in an arbitrary medium is studied. The radiation properties of electromagnetic fields of such an antenna are investigated. It is demonstrated that the surface of integration should be closed because the currents on the caps of the insulator make a significant contribution to the fields and input impedance of the insulator dipole. It is observed that the insulated antenna has a more uniform near field along the antenna than the bare antenna. Also, it is seen that the coating material changes the effective length, near field, and input impedance of insulated antennas.<>

Keywords

antenna radiation patterns; dipole antennas; axisymmetric geometry; coating material; currents; effective length; electromagnetic fields; homogeneous medium; input impedance; insulated antenna; insulator dipole; near field; radiation properties; surface of integration; Boundary conditions; Conductors; Dielectrics and electrical insulation; Differential equations; Dipole antennas; Magnetic analysis; Magnetic fields; Moment methods; Surface impedance; Surface treatment;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1991. AP-S. Digest

Conference_Location

London, Ontario, Canada

Print_ISBN

0-7803-0144-7

Type

conf

DOI

10.1109/APS.1991.175093

Filename

175093