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Tuning and gain control in electro-magnetic power systems

  • US 8,629,576 B2
  • Filed: 03/28/2008
  • Issued: 01/14/2014
  • Est. Priority Date: 03/28/2008
  • Status: Active Grant
First Claim
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1. A near-field magnetic power coupling system, comprising:

  • a receiver configured to receive power from a near-field magnetic field generated by a transmitting antenna of a transmitter that conveys power in the magnetic field via a power coupling between the receiver and the transmitter; and

    a circuit configured to supply the power received by the receiver to a load, the receiver further configured to generate and transmit a feedback signal to the transmitter, the feedback signal representing at least one characteristic of the power coupling, and the feedback signal including at least information representative of an intensity of the near-field magnetic field, and the receiver further configured to sense a change in the at least one characteristic of the power coupling that is produced by a change of at least one physical parameter of the transmitter in response to the feedback signal.

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