Position insensitive wireless charging

  • US 8,963,488 B2
  • Filed: 10/06/2011
  • Issued: 02/24/2015
  • Est. Priority Date: 09/27/2008
  • Status: Active Grant
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First Claim
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1. A wireless charging pad comprising:

  • a capacitively-loaded conducting loop source resonator, with a characteristic size, L1, connected to a switching amplifier and configured to generate an oscillating magnetic field; and

    a printed circuit board having more than one layer;

    wherein the conducting loop comprises multiple turns circumscribing an area,wherein the conducting loop comprises conducting trace patterns on at least one layer of the printed circuit board,wherein the source resonator delivers useful power to at least one device resonator with a characteristic size, L2, andwherein L1 is larger than L2.

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