Experimental Study on Split-Ring Resonators with Different Slit Widths

Pedro J. Castro, Joaquim J. Barroso, Joaquim P. Leite Neto

Associated Plasma Laboratory, National Institute for Space Research—INPE, S?o José dos Campos, Brazil..

DOI: 10.4236/jemaa.2013.59058                

Abstract

Metamaterial one-dimensional periodic structures are composed of split-ring resonators, which can display electric permittivity and magnetic permeability simultaneously negative, are studied experimentally. In the present study, each resonator is made up of two concentric circular copper rings patterned on a substrate of kapton, with slits diametrically opposite each other and with the line of the splits along the longitudinal direction of the periodic array containing seven split rings evenly spaced. The experiments consist in inserting the metamaterial slab into a square waveguide of side length 6 mm, corresponding to a cutoff frequency of 25 GHz. Transmission bands due to magnetic and electrical responses are identified for slits with aperture widths of 1 mm and 2 mm, centered at 5.67 and 6.12 GHz frequencies, respectively, values well below the 25 GHz frequency cutoff, so characterizing a medium with negative permeability and permittivity.

Keywords

Metamaterials; Split-Ring Resonators; Magnetic Response; Electric Response; Left-Handed Transmission Band

Conflicts of Interest

The authors declare no conflicts of interest.

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