Inductance of a coil in a slotted shield

Author

Young, John C. ; Butler, Chalmers M.

Author_Institution

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

Volume

50

Issue

4

fYear

2002

fDate

4/1/2002 12:00:00 AM

Firstpage

475

Lastpage

484

Abstract

The inductance of a coil in a slotted, conducting shell is investigated. At frequencies for which the coil is very small relative to wavelength, an integral equation is formulated and numerically solved for the electric field induced in the slots. From knowledge of the slot electric field, the inductance of the coil in the slotted shell can be calculated. The dependence of inductance on the presence of the slotted shell is assessed quantitatively and explained on the basis of physical principles. The inductance of a one-turn loop inside a slotted shell is measured, and the data are found to be in excellent agreement with computations. As an unslotted shield closes on a coil, inductance is reduced noticeably, but if the shield possesses axial slots, the reduction is much less significant

Keywords

antenna theory; aperture antennas; coils; conducting bodies; electric fields; inductance; integral equations; loop antennas; slot antennas; broadband wireless antennas; coil inductance; conducting shell; integral equation; one-turn loop; slot electric field; slotted shield; Apertures; Bibliographies; Broadband antennas; Circuit optimization; Coils; Frequency; Inductance measurement; Integral equations; Loaded antennas; Wire;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2002.1003383

Filename

1003383