System and methods for pocket-forming based on constructive and destructive interferences to power one or more wireless power receivers using a wireless power transmitter including a plurality of antennas

  • US 10,186,913 B2
  • Filed: 12/27/2014
  • Issued: 01/22/2019
  • Est. Priority Date: 07/06/2012
  • Status: Active Grant
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First Claim
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1. A method for transmitting wireless power, the method comprising:

  • before receiving any communications from any device within a transmission field of a transmitter;

    transmitting, by a first plurality of antennas of the transmitter, a first plurality of power transmission waves such that each of the first plurality of power transmission waves interferes constructively with other power transmission waves in the first plurality of power transmission waves to form controlled constructive interference at a predetermined first location having a receiver, wherein the first plurality of power transmission waves are radio frequency waves;

    transmitting, by a second plurality of antennas, distinct from the first plurality of antennas, of the transmitter, a second plurality of power transmission waves, distinct from the first plurality of power transmission waves, such that each of the second plurality of power transmission waves interferes destructively with other power transmission waves in the second plurality of power transmission waves to form controlled destructive interference at a predetermined second location without any receiver, wherein the second plurality of power transmission waves are radio frequency waves, and wherein the controlled destructive interference substantially surrounds the controlled constructive interference;

    receiving, by a communications component of the transmitter, a communication signal from the receiver; and

    adjusting, by a controller of the transmitter, a phase or a gain and phase of at least one power transmission wave in each of (i) the first plurality of power transmission waves and (ii) the second plurality of power transmission waves based upon the communication signal.

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