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Wireless power transmitter utilizing phase and amplitude control algorithm and wireless power receiver

  • US 10,516,302 B2
  • Filed: 04/19/2017
  • Issued: 12/24/2019
  • Est. Priority Date: 04/19/2016
  • Status: Active Grant
First Claim
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1. A wireless power transmitter comprising:

  • a signal generator configured to generate power signals;

    a detector configured to detect a phase and an amplitude of beacon signals received from a wireless power receiver;

    a modulator configured to modulate a phase and an amplitude of the power signals generated by the signal generator to be time reversed based on the received beacon signals and to be amplified, respectively;

    a controller configured to provide a phase and amplitude control algorithm to be executed by the modulator; and

    a plurality of antennas configured to receive the beacon signals and to transmit the modulated power signals to the wireless power receiver,wherein the controller assigns a respective weight value for each of the power signals to the modulator based on the phase and amplitude control algorithm,wherein the amplitude of the power signals generated by the signal generator is amplified in a way that a greater the amplitude of the respective beacon signal received by a corresponding antenna of the plurality of antennas, a greater the weight value for amplifying the respective power signal transmitted by the corresponding antenna, andwherein the detector is further configured to perform feedback operation for detecting a phase and an amplitude of modified beacon signals over time, and detect respective rates of change as a function of time in the phase and the amplitude of the beacon signals, and the modulator is further configured to perform a time reversal process on the phase of the power signals and to amplify the amplitude of the power signals based on the modified beacon signals when at least one of the detected respective rates of change exceeds a predetermined value.

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