TITLE:
Experimental Study on Split-Ring Resonators with Different Slit Widths
AUTHORS:
Pedro J. Castro, Joaquim J. Barroso, Joaquim P. Leite Neto
KEYWORDS:
Metamaterials; Split-Ring Resonators; Magnetic Response; Electric Response; Left-Handed Transmission Band
JOURNAL NAME:
Journal of Electromagnetic Analysis and Applications,
Vol.5 No.9,
September
27,
2013
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.