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Systems and methods for forward link communication in wireless power systems

  • US 9,166,439 B2
  • Filed: 11/05/2012
  • Issued: 10/20/2015
  • Est. Priority Date: 11/05/2012
  • Status: Expired due to Fees
First Claim
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1. A wireless charging device for providing wireless power to a receiving device, the wireless charging device comprising:

  • a primary transmit antenna configured to generate a wireless power field;

    a parasitic antenna configured to adjust a coupling between the primary transmit antenna and the receiving device;

    a switching element electrically coupled to the parasitic antenna and configured to enable or disable the parasitic antenna; and

    a controller configured to control the switching element electrically coupled to the parasitic antenna to adjust the coupling according to a pattern detectable by the receiving device, wherein the controller performs communication with the receiving device by the adjustment of the parasitic antenna.

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