Journal Title

Radio Science

Publication Date

11-1983

Abstract

A previous analysis of a linear current source of finite length embedded in a conducting medium of infinite extent is extended to linear current sources of (1) infinite length and (2) semi-infinite length. Electric and magnetic field expressions are derived, and the results are numerically evaluated for frequencies in the ULF/ELF bands. For convenience, some of the results are presented in a dimensionless form. A comparison is made between the electromagnetic fields produced by linear current sources of finite and infinite length, and it is shown that there is a relative enhancement in the electric field near the source of finite length. It is also found that an optimum frequency exists for the electric field produced by a linear current source of infinite length at which the field amplitude is a maximum at a fixed observation point. Some practical applications of our results are suggested.

Subjects

Electromagnetic fields; ELF electromagnetic fields; Electromagnetic waves

Publication Information

© 1983, American Geophysical Union.

DOI

10.1029/RS018i006p01383

Peer-Reviewed

Yes

Document Type

Journal Article

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