Wireless non-radiative energy transfer

  • US 8,022,576 B2
  • Filed: 03/31/2009
  • Issued: 09/20/2011
  • Est. Priority Date: 07/12/2005
  • Status: Active Grant
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First Claim
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1. A method for wirelessly providing electromagnetic power to a load comprising:

  • providing a first electromagnetic resonator structure receiving power from an power supply, said first resonator structure having a mode with a resonant frequency ω

    1, an intrinsic loss rate Γ

    1, and a first Q-factor Q1

    1/(2Γ

    1),providing a second electromagnetic resonator structure being positioned distal from said first resonator structure and not electrically wired to the first resonator structure, said second resonator structure coupled to the load and having a mode with a resonant frequency ω

    2, an intrinsic loss rate Γ

    2, and a second Q-factor Q2

    2/(2Γ

    2), andwirelessly providing electromagnetic power from said first resonator structure to said second resonator structure 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,wherein the electromagnetic resonator structures are designed to have (√

    {square root over (Q1Q2)})>

    100 .

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