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International Journal of Antennas and Propagation
Volume 2012 (2012), Article ID 613518, 6 pages
Research Article

Broadband Equivalent Circuit Model for a Coplanar Waveguide Line Loaded with Split Ring Resonators

1Departamento de Ingeniería Eléctrica, Electrónica, Automática y Comunicaciones, Universidad de Castilla-La Mancha, Escuela Politécnica de Cuenca, Campus Universitario, 16071 Cuenca, Spain
2Departamento de Comunicaciones, Universidad Politécnica de Valencia, 46022 Valencia, Spain

Received 17 September 2012; Accepted 16 October 2012

Academic Editor: Eric Lheurette

Copyright © 2012 Victor Sanz et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A new equivalent circuit for a coplanar waveguide loaded with split ring resonators is presented. The traditional circuits that model these devices are only able to characterize the left-handed propagation band, and their response is very similar to the real one within a very limited bandwidth. In contrast, this proposed broadband equivalent circuit is able to portray not only the left-handed propagation band, but also the right-handed one that occurs at higher frequencies. Besides, the response of this kind of basic cells can be adjusted with the proposed circuit model in a bandwidth close to a decade.