Wireless energy transfer in lossy environments

  • US 9,742,204 B2
  • Filed: 04/13/2016
  • Issued: 08/22/2017
  • Est. Priority Date: 09/27/2008
  • Status: Active Grant
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First Claim
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1. A wireless power source for transferring power to a wirelessly chargeable mobile electronic device, the wireless power source comprising:

  • a source magnetic resonator comprising a capacitively-loaded conducting loop configured to generate an oscillating magnetic field to transfer wireless power to a device magnetic resonator of the electronic device, wherein the source magnetic resonator has an unperturbed source quality factor QS; and

    material positioned to space lossy material from at least a portion of the conducting loop and thereby form a keep-out zone,wherein the keep-out zone enables the source magnetic resonator to have a perturbed source quality factor, QS,perturbed, that is at least 50% of the unperturbed source quality factor QS when the lossy material is positioned immediately outside the keep-out zone.

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