Transient Magnetic Shielding of a Planar Conductive Thin Screen via Exact Image Theory

Abstract

The exact image theory is here applied to study the transient shielding effectiveness of a canonical shielding configuration, i.e., a small current loop in the presence of a parallel planar thin conductive sheet. In particular, the Green function providing the electromagnetic field produced by a pulsed vertical magnetic dipole in the whole space is derived in a closed analytical form. The recently introduced definitions of transient shielding effectiveness are used to evaluate the shielding properties of the configuration. The derived results allow for calculations in a closed form for simple transient waveforms of the exciting currents.

Comments on “Transient Magnetic Shielding of a Planar Conductive Thin Screen via Exact Image Theory”

“…It is next demonstrated that (a corrected version of) this result can be readily deduced from several previously published papers on the subject (not referenced in [1]). Indeed, the pulsed EM signal transmission via a conductive sheet is described in [2], where the plasmonic behavior of conduction electrons in the metal has been additionally accounted for.…”

“…The problem configuration (see Fig. 1) under consideration is essentially identical to the one analyzed in [1], [2], [3], for instance. It consists of a horizontal transmitting loop, L T , and a receiving loop, L R , that are separated by a thin highly conducting sheet of thickness δ and conductivity σ.…”

“…The transient electromagnetic (EM) shielding effectiveness of a homogeneous thin sheet with (dispersion-free) conductive properties has been recently analyzed in [1] using a sophisticated joint-transform technique relying on space-time Fourier transforms. The main result of [1] is a time-domain (TD) analytical expression for the normal component (with respect to the planar layer) of the magnetic-field strength [1,Eq. (50)] that is subsequently employed to evaluate the TD shielding performance of the thin sheet.…”

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The main result of Ref. [1] is put into context of previously published papers on the subject. Its correction is described.Index Terms-electromagnetic (EM) shielding, time-domain (TD) analysis, transient EM fields.

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“…The main result of Ref. [1] is put into context of previously published papers on the subject. Its correction is described.…”