Near field transmitters for wireless power charging of an electronic device by leaking RF energy through an aperture

  • US 10,027,158 B2
  • Filed: 02/17/2016
  • Issued: 07/17/2018
  • Est. Priority Date: 12/24/2015
  • Status: Active Grant
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First Claim
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1. A near-field transmitter comprising:

  • a plurality of unit cells configured to receive one or more radio frequency (RF) signals, each unit cell in the plurality of unit cells including;

    a metal layer having an interior perimeter that surrounds an aperture defined by the metal layer; and

    a patch antenna positioned within the aperture, wherein a perimeter of the patch antenna has a separation from the interior perimeter of the metal layer, the patch antenna being configured to;

    (i) receive one of the one or more RF signals, the received RF signal having a frequency based on the separation between the perimeter of the patch antenna and the interior perimeter of the metal layer, and(ii) radiate the received RF signal as an RF energy signal for charging an electronic device,wherein the RF energy signal is leaked at least in part through the separation between the perimeter of the patch antenna and the interior perimeter of the metal layer only when an antenna of the electronic device is positioned in a near-field distance from the unit cell.

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