Near field transmitters for wireless power charging of an electronic device by leaking RF energy through an aperture offset from a patch antenna

  • US 10,135,286 B2
  • Filed: 02/17/2016
  • Issued: 11/20/2018
  • 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 radiate one or more radio frequency (RF) power transmission waves, each unit cell in the plurality of unit cells including;

    opposing top and bottom surfaces;

    a ground plane coupled with the bottom surface;

    a metal portion having an interior perimeter that surrounds an aperture defined by the metal portion, wherein the metal portion is part of the top surface; and

    a patch antenna that is;

    (i) separate from and positioned underneath the aperture defined by the metal portion and (ii) positioned above the ground plane, the patch antenna being configured to radiate one or more RF power transmission waves for wirelessly charging an electronic device,wherein;

    the one or more RF power transmission waves are leaked at least in part through the aperture and received by an antenna of the electronic device when the antenna of the electronic device is positioned in a near-field distance from the unit cell; and

    the electronic device uses energy from the one or more RF power transmission waves received by the antenna to power or charge the electronic device.

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