Systems and methods for wireless power transmission by modifying a number of antenna elements used to transmit power waves to a receiver

  • US 9,923,386 B1
  • Filed: 06/23/2015
  • Issued: 03/20/2018
  • Est. Priority Date: 07/06/2012
  • Status: Active Grant
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First Claim
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1. A method for wireless power transmission, the method comprising:

  • receiving, by a communications component of a transmitter that includes an antenna array for transmitting radio frequency (RF) power waves, a first communication signal from a receiver, the first communication signal comprising a location associated with the receiver;

    transmitting, by the transmitter, a first set of at least two RF power waves using a first set of at least two RF antenna elements of the antenna array to the location of the receiver such that the first set of RF power waves converges to form a first constructive interference pattern proximate to the location of the receiver;

    receiving, by the communications component of the transmitter from the receiver, a second communication signal indicating a first amount of power received by the receiver based on the first constructive interference pattern;

    in accordance with a determination, by a processor of the transmitter and based at least in part of the first amount of power received by the receiver, that a number of RF antenna elements used to transmit RF power waves to the receiver should be modified, selecting a second set of at least two RF antenna elements of the antenna array to transmit RF power waves to the receiver, wherein the second set of at least two RF antenna elements is different from the first set of at least two RF antenna elements; and

    transmitting, by the second set of at least two RF antenna elements of the antenna array of the transmitter, a second set of at least two RF power waves to the location of the receiver such that the second set of RF power waves converges to form a second constructive interference pattern proximate to the location of the receiver.

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