Miniaturized microstrip and CPW filters using coupled metamaterial resonators

Joan García-García, Jordi Bonache, Ignacio Gil, Ferran Martín, María Del Castillo Velázquez-Ahumada, Jesús Martel

Research output: Contribution to journalArticleResearchpeer-review

98 Citations (Scopus)


In this paper, it is shown that the application of metamaterial resonators to the design of planar microwave filters provides a high level of miniaturization for such devices. Specifically, split-ring resonator, complementary split-ring resonator, and spiral resonator are used to synthesize microwave filters using the coupling coefficient approach. Some considerations in order to improve and control the coupling coefficients between resonators are exposed. The magnetic and electric character of the coupling coefficient is analyzed in detail, and a method to identify this coupling is proposed. Finally, several prototype device filters operative at S-band are provided to illustrate the proposed techniques. © 2006 IEEE.
Original languageEnglish
Pages (from-to)2628-2634
JournalIEEE Transactions on Microwave Theory and Techniques
Publication statusPublished - 1 Jun 2006


  • Coupling coefficient
  • Metamaterials
  • Planar filters
  • Quasi-elliptic filters


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