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Wireless power transmission system

  • US 8,159,364 B2
  • Filed: 08/23/2010
  • Issued: 04/17/2012
  • Est. Priority Date: 06/14/2007
  • Status: Active Grant
First Claim
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1. A wireless microwave power transmitter comprising:

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

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

    the controller further configured to adjust the respective selected phase for use in transmitting the respective power transmission signal to a respective determined phase, the respective determined phase based on the respective detected phase wherein the respective determined phase indicates an optimal phase for the power transmission signal to be transmitted to the device to be charged; and

    wherein each power transmission signal is transmitted without utilizing a location signal, if any, from the device to be charged that indicates the location of the device to be charged, andwherein the microwave transmitter and device to be charged are not required to be in line of sight of each other.

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