• US 20120091950A1
  • Filed: 10/06/2011
  • Published: 04/19/2012
  • 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 fieldwherein the conducting loop comprises multiple turns circumscribing an area,wherein the conducting loop does not extend into the center of the circumscribed area,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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