On Electrical Equivalence of Aperture-Body and Transmission-Cavity Resonance Phenomena in Subwavelength Conducting Aperture Systems from an Equivalent Circuit Point of View

TL;DR

This paper demonstrates that aperture-body resonance and transmission-cavity resonance phenomena in subwavelength conducting aperture systems are fundamentally equivalent, using an equivalent circuit perspective to unify their understanding.

Contribution

It establishes the electrical equivalence of ABR and TCR phenomena through circuit models, clarifying their similar resonance conditions and transmission mechanisms.

Findings

ABR and TCR share identical resonance conditions.

Equivalent circuit models unify the understanding of both phenomena.

Transmission width is consistent across ABR and TCR scenarios.

Abstract

For a narrow slit structure backed by a conducting strip which is taken as a representative example of an aperture-body resonance (ABR) problem, the transmission resonance condition (i.e., condition for maximum power transmission) and the transmission width (i.e., normalized maximum transmitted power through the slit) are found to be the same as those for narrow slit coupling problem in a thick conducting screen, which is designated as a transmission-cavity resonance (TCR) problem. From a viewpoint of equivalent circuit representation for the transmission resonance condition and the funneling mechanism, the ABR and the TCR problems are thought to be essentially of the same nature.