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RFID TAG SENSORS AND METHODS

  • US 20110012713A1
  • Filed: 09/16/2010
  • Published: 01/20/2011
  • Est. Priority Date: 03/10/2009
  • Status: Active Grant
First Claim
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1. A radio frequency identification (RFID) sensor system comprising:

  • an RFID device comprising;

    a near field only RFID tag, wherein the near field only RFID tag in and of itself does not function as a far field RFID tag;

    a conductive element independent from the near field only RFID tag and configured to function as a far field antenna; and

    a coupling structure coupled to the near field only RFID tag and the conductive element, wherein the coupling structure is configured to selectively locate the near field only RFID tag and the conductive element in at least a first position and a second position relative to each other;

    wherein the first position locates the near field only RFID tag and the conductive element relative to each other such that the conductive element is sufficiently decoupled from the near field only RFID tag in order that the RFID device only operates in a near field with respect to an RFID reader; and

    wherein the second position locates the near field only RFID tag and the conductive element relative to each other such that the conductive element is sufficiently coupled to the near field only RFID tag such that the RFID device operates in both the near field and a far field with respect to the RFID reader.

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