METHOD AND APPARATUS FOR ADAPTIVE TUNING OF WIRELESS POWER TRANSFER

  • US 20090284220A1
  • Filed: 11/06/2008
  • Published: 11/19/2009
  • Est. Priority Date: 05/13/2008
  • Status: Active Grant
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First Claim
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1. A wireless power receiver, comprising:

  • a receive antenna for coupling with a transmit antenna through a near field radiation generated by the transmit antenna to generate an RF signal;

    a voltage standing wave ratio detector operably coupled to the receive antenna to generate a mismatch signal indicating a degree of mismatch at the receive antenna;

    a controller operably coupled to the mismatch signal to analyze the mismatch signal and generate control signals responsive thereto; and

    a variable capacitor network operably coupled to the control signals and between the receive antenna and the RF signal, the variable capacitor network to modify a resonance characteristic of the receive antenna and the variable capacitor network by modifying a capacitance of the variable capacitor network responsive to the control signals.

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