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.
Electromagnetic fields; ELF electromagnetic fields; Electromagnetic waves
Citation: Pilot Scholars Version (Modified MLA Style)
Inan, Aziz S.; Fraser-Smith, A. C.; and Villard, O. G. Jr., "ULF/ELF electromagnetic fields produced in a conducting medium of infinite extent by linear current sources of infinite length" (1983). Engineering Faculty Publications and Presentations. Paper 4.