Near field transmitters with contact points for wireless power charging

  • US 10,141,771 B1
  • Filed: 02/17/2016
  • Issued: 11/27/2018
  • 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 feed that is configured to receive radio frequency (RF) energy from a power source;

    a housing with a cover and metallic sidewalls, the housing defining first and second cavities that are separated by a ground plane; and

    a plurality of contact points extending from the second cavity to the cover of the housing, wherein;

    each contact point of the plurality of contact points is located in a different region of the cover;

    the feed is configured to provide the RF energy to the first cavity;

    the first cavity is configured to retain the RF energy provided by the feed;

    a respective contact point of the plurality is configured to leak the RF energy to a wireless-power-receiving antenna of a first electronic device when a metal part of the first electronic device is positioned on the cover at a point that contacts the respective contact point, the respective contact point being a first contact point of the plurality of contact points; and

    a second contact point of the plurality is configured to leak the RF energy to a wireless-power-receiving antenna of a second electronic device when a metal part of the second electronic device is positioned on the cover at a different point that contacts the second contact point.

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