ADAPTIVE IMPEDANCE TUNING IN WIRELESS POWER TRANSMISSION

  • US 20100277003A1
  • Filed: 02/25/2010
  • Published: 11/04/2010
  • Est. Priority Date: 03/20/2009
  • Status: Active Grant
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First Claim
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1. A wireless power receiver, comprising:

  • a rectifier for operable coupling to a receive antenna to couple with near field radiation in a coupling-mode region, the rectifier for converting the RF signal to a DC input signal;

    a direct current (DC)-to-DC converter operably coupled to the DC input signal and a pulse-width modulation signal to generate a DC output signal responsive to the DC input signal and the pulse-width modulation signal; and

    a pulse modulator operably coupled to the pulse-width modulation signal to adjust an AC impedance of the wireless power receiver by modifying a duty cycle of the pulse-width modulation signal to the DC-to-DC converter responsive to a voltage of the DC input signal.

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