Wireless energy transfer in lossy environments

  • US 9,184,595 B2
  • Filed: 02/13/2010
  • Issued: 11/10/2015
  • Est. Priority Date: 09/27/2008
  • Status: Active Grant
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First Claim
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1. A wireless power transfer system comprising:

  • a source magnetic resonator comprising a capacitively-loaded conducting loop coupled to a power source and configured to generate an oscillating magnetic field to transfer power wirelessly to a device magnetic resonator, the source magnetic resonator having an unperturbed source quality factor Qs; and

    a layer of non-lossy material that surrounds the source magnetic resonator to form a keep-out zone,wherein a perturbed quality factor Qperturbed of the source magnetic resonator due to lossy material outside the keep-out zone is at least 50% of the unperturbed source quality factor Qs.

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