Abstract
We obtain, solution for the current distribution on a linear antenna excited by a given e.m.f. The antenna is an infinitely, long, perfectly conducting cylinder immersed in a plasma and aligned with an external magnetic field. The obtained current distribution in the VLF band is contributed by the eigenmode guided by the cylinder and waves of the continuous spatial spectrum. We show that the current distribution of a sufficiently thin antenna is determined mainly by the eigenmode. The antenna current is calculated both analytically and numerically under ionospheric conditions. The validity criteria for using the transmission-line theory to obtain the current distribution on a linear antenna in a magnetoplasma are discussed.
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