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Multi-element RFID coupler

  • US 9,391,675 B2
  • Filed: 07/12/2013
  • Issued: 07/12/2016
  • Est. Priority Date: 10/31/2005
  • Status: Active Grant
First Claim
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1. A near field coupler system comprising:

  • a transceiver;

    a near field coupler in electrical communication with the transceiver, the near field coupler configured to transmit wireless signals to a targeted transponder, the near field coupler comprising;

    a dielectric substrate having a first surface and a second surface;

    a ground plane adjacent to the second surface of the dielectric substrate;

    radiating elements disposed on the first surface of the dielectric substrate, wherein the radiating elements are coupled to the ground plane through one or more terminating resistors; and

    at least one switching element coupled to each of the radiating elements, wherein the at least one switching element is;

    provided in electrical communication with the transceiver; and

    configured to selectively activate one or more radiating elements among the radiating elements to provide selective wireless communications between the transceiver and the one or more of the radiating elements to communicate with the targeted transponder having an unknown orientation relative to the radiating elements; and

    a processor configured to determine a transceiver power level required to effectively communicate with the targeted transponder.

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