Equivalent-circuit models for split-ring resonators and complementary split-ring resonators coupled to planar transmission lines

Juan Domingo Baena, Jordi Bonache, Ferran Martín, Ricardo Marqués Sillero, Francisco Falcone, Txema Lopetegi, Miguel A.G. Laso, Joan García-García, Ignacio Gil, Maria Flores Portillo, Mario Sorolla

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1032 Citations (Scopus)

Abstract

In this paper, a new approach for the development of planar metamaterial structures is developed. For this purpose, split-ring resonators (SRRs) and complementary split-ring resonators (CSRRs) coupled to planar transmission lines are investigated. The electromagnetic behavior of these elements, as well as their coupling to the host transmission line, are studied, and analytical equivalent-circuit models are proposed for the isolated and coupled SRRs/CSRRs. From these models, the stopband/passband characteristics of the analyzed SRR/CSRR loaded transmission lines are derived. It is shown that, in the long wavelength limit, these stopbands/passbands can be interpreted as due to the presence of negative/positive values for the effective ε and μ of the line. The proposed analysis is of interest in the design of compact microwave devices based on the metamaterial concept. © 2005 IEEE.
Original languageEnglish
Pages (from-to)1451-1460
JournalIEEE Transactions on Microwave Theory and Techniques
Volume53
DOIs
Publication statusPublished - 1 Apr 2005

Keywords

  • Duality
  • Metamaterials
  • Microwave filters
  • Split-ring resonators (SRRs)

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