Near field transmitters with harmonic filters for wireless power charging

  • US 10,116,162 B2
  • Filed: 02/17/2016
  • Issued: 10/30/2018
  • 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 radio frequency (RF) energy 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;

    a patch antenna configured to radiate an RF energy signal having a plurality of different harmonic frequencies including a center frequency, wherein;

    a perimeter of the patch antenna has a separation from the interior perimeter of the metal layer, anda receiving electronic device includes at least one antenna that is tuned to receive an RF energy signal having the center frequency; and

    a harmonic RF filter positioned on at least the patch antenna, the harmonic RF filter being configured to suppress radiation of any of the plurality of different harmonic frequencies, except for the center frequency, when the RF energy signal is radiated by the patch antenna and the RF energy signal interacts with the harmonic RF filter.

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