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Materials 2011, 4(1), 117-130; doi:10.3390/ma4010117

Sub-Wavelength Resonances in Metamaterial-Based Multi-Cylinder Configurations

*  and
Department of Electrical Engineering, Electromagnetic Systems, Technical University of Denmark, Ørsteds Plads, Bld. 348, DK-2800, Kgs. Lyngby, Denmark
* Author to whom correspondence should be addressed.
Received: 31 October 2010 / Revised: 23 December 2010 / Accepted: 30 December 2010 / Published: 31 December 2010
(This article belongs to the Special Issue Next Wave of Metamaterials)
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Sub-wavelength resonances known to exist in isolated metamaterial-based structures of circular cylindrical shape are investigated with the purpose of determining whether the individual resonances are retained when several of such resonant structures are grouped to form a new structure. To this end, structures consisting of 1, 2 and 4 sets of metamaterial-based concentric cylinders excited by an electric line current are analyzed numerically. It is demonstrated that these structures recover the resonances of the individual structures even when the cylinders are closely spaced and the new structure is thus electrically small. The investigation is conducted through a detailed analysis of the electric near-field distribution as well as the radiation resistance in those cases where the individual structures are made of simple dielectric materials in conjunction with simple, but lossy and dispersive, metamaterials.
Keywords: metamaterials; sub-wavelength resonances; scattering; line source metamaterials; sub-wavelength resonances; scattering; line source
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Arslanagić, S.; Breinbjerg, O. Sub-Wavelength Resonances in Metamaterial-Based Multi-Cylinder Configurations. Materials 2011, 4, 117-130.

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