The effect of inhomogeneous dielectric loading on transmission through a slot in an infinite thick metallic shield

ABSTRACT

Transmission through a slot in a an infinite metallic shield of finite thickness, inhomogeneously loaded with dielectric material, is modeled using an analytical approximation based on the slot being small compared to a free space wavelength. Resonances of relatively broad bandwidth (Fabry-Perot) as well as of very narrow bandwidth (Fano) are found. We show that by introducing a gap of different dielectric constant within the slot, we can control the separation between the broad bandwidth resonances, and the locations and magnitudes of the very narrow bandwidth resonances. The influence of grooves on both kinds of resonances is considered using the same analytical model. The effect of losses in the dielectric slot is also considered, using data for commercially available dielectrics.

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Disclosure statement

No potential conflict of interest was reported by the author(s).

ORCID

Abdulaziz H. Haddab  http://orcid.org/0000-0003-2803-6091

Notes

1 A brief preliminary version of the work presented in this paper has been given in [22].