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Universal apparatus for wireless device charging using radio frequency (RF) energy

  • US 9,087,637 B2
  • Filed: 07/29/2012
  • Issued: 07/21/2015
  • Est. Priority Date: 07/29/2012
  • Status: Active Grant
First Claim
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1. An apparatus for wireless charging using radio frequency (RF) energy, comprising:

  • a charger coil configured to produce RF charging energy as a magnetic field, the charger coil located proximate to a magnetic material and a metal material, the magnetic material and the metal material located to attenuate the magnetic field generated by the charger coil beyond a plane defined by a major surface of the magnetic material and the metal material, a first portion of the magnetic material underlying the charger coil and a second portion of magnetic material overlying the charger coil, wherein the magnetic material and the metal material attenuate the magnetic field beyond the plane between 10% and 90%.

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