Volumetric metamaterials versus impedance surfaces in scattering applications

Abstract Artificially created media allow employing material parameters as additional valuable degrees of freedom in tailoring electromagnetic scattering. In particular, metamaterials with either negative permeability or permittivity allow creating deeply subwavelength resonant structures with relat...

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Autores principales:	S. Kosulnikov, D. Filonov, A. Boag, P. Ginzburg
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1387f537fea949bcad8bdb80727e2af5
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spelling	oai:doaj.org-article:1387f537fea949bcad8bdb80727e2af52021-12-02T16:51:49ZVolumetric metamaterials versus impedance surfaces in scattering applications10.1038/s41598-021-88421-22045-2322https://doaj.org/article/1387f537fea949bcad8bdb80727e2af52021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88421-2https://doaj.org/toc/2045-2322Abstract Artificially created media allow employing material parameters as additional valuable degrees of freedom in tailoring electromagnetic scattering. In particular, metamaterials with either negative permeability or permittivity allow creating deeply subwavelength resonant structures with relatively high scattering cross-sections. However, the equivalence principle allows replacing volumetric structures with properly designed curved impedance surfaces, ensuring the same electromagnetic properties. Here, we examine this statement from a practical standpoint, considering two structures, having a dipolar electric resonance at the same frequency. The first realization is based on arrays of inductively loaded electric dipoles printed on stacked circuit boards (a volumetric metamaterial), while the second structure utilizes a 4-wire spiral on a spherical surface (surface impedance realization). An intermediate conclusion is that the surface implementation tends to outperform the volumetric counterparts in the scenario when a single resonance is involved. However, in the case where multiple resonances are overlapping and lossy materials are involved, volumetric realization can have an advantage. The discussed structures are of significant importance to the field of electrically small antennas, superdirective antennas, and superscatterers, which find use in wireless communications and radar applications, to name just a few.S. KosulnikovD. FilonovA. BoagP. GinzburgNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q S. Kosulnikov D. Filonov A. Boag P. Ginzburg Volumetric metamaterials versus impedance surfaces in scattering applications
description	Abstract Artificially created media allow employing material parameters as additional valuable degrees of freedom in tailoring electromagnetic scattering. In particular, metamaterials with either negative permeability or permittivity allow creating deeply subwavelength resonant structures with relatively high scattering cross-sections. However, the equivalence principle allows replacing volumetric structures with properly designed curved impedance surfaces, ensuring the same electromagnetic properties. Here, we examine this statement from a practical standpoint, considering two structures, having a dipolar electric resonance at the same frequency. The first realization is based on arrays of inductively loaded electric dipoles printed on stacked circuit boards (a volumetric metamaterial), while the second structure utilizes a 4-wire spiral on a spherical surface (surface impedance realization). An intermediate conclusion is that the surface implementation tends to outperform the volumetric counterparts in the scenario when a single resonance is involved. However, in the case where multiple resonances are overlapping and lossy materials are involved, volumetric realization can have an advantage. The discussed structures are of significant importance to the field of electrically small antennas, superdirective antennas, and superscatterers, which find use in wireless communications and radar applications, to name just a few.
format	article
author	S. Kosulnikov D. Filonov A. Boag P. Ginzburg
author_facet	S. Kosulnikov D. Filonov A. Boag P. Ginzburg
author_sort	S. Kosulnikov
title	Volumetric metamaterials versus impedance surfaces in scattering applications
title_short	Volumetric metamaterials versus impedance surfaces in scattering applications
title_full	Volumetric metamaterials versus impedance surfaces in scattering applications
title_fullStr	Volumetric metamaterials versus impedance surfaces in scattering applications
title_full_unstemmed	Volumetric metamaterials versus impedance surfaces in scattering applications
title_sort	volumetric metamaterials versus impedance surfaces in scattering applications
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1387f537fea949bcad8bdb80727e2af5
work_keys_str_mv	AT skosulnikov volumetricmetamaterialsversusimpedancesurfacesinscatteringapplications AT dfilonov volumetricmetamaterialsversusimpedancesurfacesinscatteringapplications AT aboag volumetricmetamaterialsversusimpedancesurfacesinscatteringapplications AT pginzburg volumetricmetamaterialsversusimpedancesurfacesinscatteringapplications
_version_	1718382902840918016

Volumetric metamaterials versus impedance surfaces in scattering applications

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