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Sub-Wavelength Resonances in Metamaterial-Based Multi-Cylinder Configurations
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; in revised form: 23 December 2010 / Accepted: 30 December 2010 / Published: 31 December 2010
Abstract: 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
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Arslanagić, S.; Breinbjerg, O. Sub-Wavelength Resonances in Metamaterial-Based Multi-Cylinder Configurations. Materials 2011, 4, 117-130.
Arslanagić S, Breinbjerg O. Sub-Wavelength Resonances in Metamaterial-Based Multi-Cylinder Configurations. Materials. 2011; 4(1):117-130.
Arslanagić, Samel; Breinbjerg, Olav. 2011. "Sub-Wavelength Resonances in Metamaterial-Based Multi-Cylinder Configurations." Materials 4, no. 1: 117-130.