In this paper, we demonstrate a new method to control the enhanced transmission due to Fabry–Perot resonances through an array of dielectric-loaded slots in a thick metallic screen. We obtain approximate analytical formulas for each polarization (TM and TE) using a mode-matching technique based on the assumption that the slots are small compared to a free-space wavelength and that the metallic screen is a perfect electric conductor as is appropriate for microwave frequency applications. We show that the bandwidth and locations of enhanced transmission can be controlled by the angle of incidence or by making the material filling the slots inhomogeneous. Computational results are given that demonstrate the influence of the angle of incidence on the enhanced transmission bandwidth. We show that the separation between enhanced transmission frequencies can be controlled by introducing a gap within the slot with a different dielectric constant. Also, we illustrate how the total transmission bandwidth can be increased by adjusting the angle of incidence and the gap size.
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14 June 2019
Research Article|
June 13 2019
Oblique incidence of a plane wave on an inhomogeneously loaded grating of slots in a screen
Special Collection:
Dielectric Nanoresonators and Metamaterials
Abdulaziz H. Haddab
;
Abdulaziz H. Haddab
a)
Department of Electrical, Computer and Energy Engineering, University of Colorado
, Boulder, Colorado 80309, USA
Search for other works by this author on:
Edward F. Kuester
Edward F. Kuester
b)
Department of Electrical, Computer and Energy Engineering, University of Colorado
, Boulder, Colorado 80309, USA
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a)
Electronic mail: haddab@Colorado.edu
b)
Electronic mail: Edward.Kuester@Colorado.edu
Note: This paper is part of the Special Topic on Dielectric Nanoresonators and Metamaterials.
J. Appl. Phys. 125, 225305 (2019)
Article history
Received:
December 29 2018
Accepted:
May 24 2019
Citation
Abdulaziz H. Haddab, Edward F. Kuester; Oblique incidence of a plane wave on an inhomogeneously loaded grating of slots in a screen. J. Appl. Phys. 14 June 2019; 125 (22): 225305. https://doi.org/10.1063/1.5087213
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