Strong coupling optimization with planar spiral resonators

Avraham Klein, Nadav Katz

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Planar spirals offer a highly scalable geometry appropriate for wireless power transfer via strongly coupled inductive resonators. We numerically derive a set of geometric scale and material independent coupling terms, and analyze a simple model to identify design considerations for a variety of different materials. We use our model to fabricate integrated planar resonators of handheld sizes, and optimize them to achieve high-Q factors, comparable to much larger systems, and strong coupling over significant distances with approximately constant efficiency.

Original languageEnglish
Pages (from-to)1188-1191
Number of pages4
JournalCurrent Applied Physics
Issue number5
StatePublished - Sep 2011
Externally publishedYes


  • Electromagnetic devices
  • Resonant coupling
  • Wireless power transfer


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