• US 20090284245A1
  • Filed: 11/07/2008
  • Published: 11/19/2009
  • Est. Priority Date: 05/13/2008
  • Status: Active Grant
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First Claim
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1. An apparatus, comprising:

  • a transmitting device comprising at least one of an equipment and a household appliance for use in a wireless transfer system;

    the transmitting device, comprising;

    a transmit antenna to wirelessly transfer power to a receive antenna by generating a near field radiation at a resonant frequency within a coupling-mode region;

    an amplifier for applying an RF signal to the transmit antenna;

    a presence detector for detecting a presence of a receiver device within the coupling-mode region and generating a presence signal; and

    a controller operably coupled to the presence detector and the amplifier, the controller for adjusting a power output of the amplifier responsive to the presence signal.

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