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Wireless power transmission system

  • US 8,854,176 B2
  • Filed: 10/14/2013
  • Issued: 10/07/2014
  • Est. Priority Date: 06/14/2007
  • Status: Active Grant
First Claim
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1. A rechargeable battery, comprising:

  • circuitry configured to receive power transmission signals from a wireless microwave power transmitter to charge the rechargeable battery;

    wherein the wireless microwave power transmitter comprises;

    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 each said transceiver operable to detect a phase at which each of the multipath calibration signals is received by the respective transceiver;

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

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

    wherein the microwave power transmitter and rechargeable battery are not required to be in line of sight of each other.

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