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RADIO FREQUENCY IDENTIFICATION (RFID) TAG INCLUDING A THREE-DIMENSIONAL LOOP ANTENNA

  • US 20090207027A1
  • Filed: 06/20/2008
  • Published: 08/20/2009
  • Est. Priority Date: 02/14/2008
  • Status: Active Grant
First Claim
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1. A radio frequency identification (RFID) tag comprising:

  • a loop antenna that includes;

    a first conductive portion having a length and width that substantially exceed a thickness of the first conductive portion, wherein the length and width of the first conductive portion substantially lie in a first plane, at least a portion of the first conductive portion forming a tuning element for tuning an impedance of the loop antenna; and

    a second conductive portion having a length and width that substantially exceed a thickness of the second conductive portion, wherein the length and width of the second conductive portion substantially lie in a second plane that is substantially parallel to the first plane, the second conductive portion being electrically coupled to the first conductive portion; and

    an RFID circuit electrically connected to the loop antenna, wherein a current is excited through the loop antenna to flow through the first conductive portion and the second conductive portion in a current loop that lies in a third plane that is substantially perpendicular to the first plane and the second plane.

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