Wireless energy transfer with high-Q devices at variable distances

  • US 8,400,020 B2
  • Filed: 12/16/2009
  • Issued: 03/19/2013
  • Est. Priority Date: 07/12/2005
  • Status: Active Grant
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First Claim
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1. A system, comprising:

  • a source high-Q resonator, configured to be coupled to an energy source, the source high-Q resonator having a resonant frequency ω

    1 and an intrinsic loss rate Γ

    1, and capable of storing electromagnetic energy with a high intrinsic quality factor Q1

    1/(2Γ

    1); and

    a second high-Q resonator, located a variable distance from the source resonator, the second high-Q resonator having a resonant frequency ω

    2 and an intrinsic loss rate Γ

    2, and capable of storing electromagnetic energy with a high intrinsic quality factor Q2

    2 (2Γ

    2),wherein the source resonator and the second resonator are configured to be coupled to wirelessly transfer electromagnetic energy from said source resonator to said second resonator over a distance D that is smaller than each of the resonant wavelengths λ

    1 and λ

    2 corresponding to the resonant frequencies ω

    1 and ω

    2, respectively.

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