Wireless energy transfer with high-Q at high efficiency

  • US 8,400,018 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 coupled to an energy source; and

    a second high-Q resonator, coupled to an energy drain, located a distance from the source resonator,wherein the source resonator and the second resonator are coupled to provide κ

    /√

    {square root over (Γ

    1Γ

    2)}>

    0.2 via near-field wireless energy transfer among the source resonator and the second resonator over a range of distances between the source resonator and the second resonator, wherein κ

    is the wireless energy transfer rate, Γ

    1 is the intrinsic loss rate of the source resonator, and Γ

    2 is the intrinsic loss rate of the second resonator.

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