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Multi-element RFID coupler

  • US 20070099566A1
  • Filed: 10/31/2005
  • Published: 05/03/2007
  • Est. Priority Date: 10/31/2005
  • Status: Active Grant
First Claim
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1. A near field coupler structured in electrical communication with a transceiver for transmitting signals to a targeted transponder, the near field coupler comprising:

  • a dielectric substrate having a first surface, a second surface, a first end and a second end;

    a terminating resistor disposed on the dielectric substrate adjacent the second end;

    a ground plane adjacent to the second surface of the dielectric substrate, a plurality of radiating elements extending proximately from the first end to the second end of the dielectric substrate along the first surface, wherein the plurality of radiating elements are connected to the ground plane through the terminating resistor, and a switching element electrically connected to the plurality of radiating elements adjacent to the first end of the dielectric substrate, wherein the switching element is provided in electrical communication with the transceiver and adapted to selectively activate one or more radiating elements among the plurality of radiating elements.

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