Wireless energy transfer with high-Q capacitively loaded conducting loops

  • US 8,400,023 B2
  • Filed: 12/23/2009
  • 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 resonant structure and a device resonant structure, the structures capable of performing wireless near-field energy transfer with a coupling rate κ

    when separated a variable distance D from each other,said source resonant structure having a resonant frequency f1

    1/2π

    , an intrinsic loss rate Γ

    1, and a first Q-factor Q1

    1/(2Γ

    1), where ω

    1 is the angular frequency corresponding to the resonant frequency f1,said device resonant structure having a resonant frequency f2

    2/2π

    , an intrinsic loss rate Γ

    2, and a second Q-factor Q2

    2/(2Γ

    2), where ω

    2 is the angular frequency corresponding to the resonant frequency f2,wherein the absolute value of the difference of said angular frequencies ω

    1 and ω

    2 is smaller than the magnitude of the coupling rate, κ

    , andwherein at least one of the resonant structures comprises a high-Q capacitively-loaded conducting-wire loop.

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