On the Radiation Properties of Split-Ring Resonators (SRRs) at the Second Resonance

Simone Zuffanelli, Gerard Zamora, Pau Aguilà, Ferran Paredes, Ferran Martín, Jordi Bonache

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)


© 2015 IEEE. The radiation properties of split-ring resonators (SRRs) at their second resonance frequency are studied for the first time in this work. In particular, the electric and magnetic dipole moments of the edge-coupled SRR are calculated analytically under the assumption of strong coupling between the internal and external rings. Based on these results, the radiation resistance and the radiation efficiency are obtained theoretically. Electromagnetic simulations of the structure reveal that there is very good agreement with the theoretical predictions, pointing out the validity of the proposed analysis. As a proof of concept, an SRR antenna prototype is designed and fabricated. Experimental data are in good agreement with the theoretical and simulated results, and demonstrate the validity of the SRR working at its second resonance frequency as a radiating element.
Original languageEnglish
Article number7111388
Pages (from-to)2133-2141
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number7
Publication statusPublished - 1 Jul 2015


  • Metamaterials
  • planar antennas
  • radiation efficiency
  • split-ring resonators (SRRs)


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