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Wireless power transmission system

  • US 9,142,973 B2
  • Filed: 10/06/2014
  • Issued: 09/22/2015
  • Est. Priority Date: 06/14/2007
  • Status: Active Grant
First Claim
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1. A wireless sensor, comprising:

  • a wireless microwave power receiver, comprising;

    one or more rectennas configured to receive power transmission signals from a wireless microwave power transmitter to charge the wireless microwave power receiver;

    wherein the wireless microwave power transmitter comprising;

    a controller and a phased array antenna having a plurality of microwave array transceivers for transmitting the microwave power transmission signals, the transceiver being adaptively-phased by the controller to transmit the power transmission signals at a respective selected phase;

    each transceiver further operable to receive multipath calibration signals from the microwave power receiver and detect a phase at which each of the multipath calibration signals is received by the transceiver;

    a transmitter configured to transmit said multipath calibration signals to said microwave power transmitter; and

    ,wherein each rectenna is further configured to receive a power transmission signal having a determined phase, the determined phase of the power transmission signal generated under the control of the controller at the microwave power transmitter being substantially a complex conjugate of a detected phase of the calibration signal; and

    wherein the microwave power transmitter and wireless microwave power receiver are not required to be in line of sight of each other; and

    wherein the controller is further configured to determine a prioritization order for transmission of the power transmission signals to the wireless microwave power receiver based upon a predefined criteria.

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