Wireless energy transfer

  • US 8,097,983 B2
  • Filed: 05/08/2009
  • Issued: 01/17/2012
  • 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 resonator optionally coupled to an energy source;

    a second resonator located a distance from the source resonator; and

    a third resonator located a distance from the source resonator and the second resonator;

    wherein the source resonator, the second resonator, and the third resonator are coupled to provide non-radiative wireless energy transfer among the resonators and wherein the second resonator is configured to receive energy from the source resonator and to transfer energy to the third resonator,wherein each resonator is an electromagnetic resonator having an angular resonant frequency ω

    , an intrinsic loss rate Γ

    , and a Q-factor Q=ω

    /(2Γ

    ), and wherein the Q-factor for at least one of the resonators is greater than 100.

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