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RADIO FREQUENCY IDENTIFICATION TAG LOCATION ESTIMATION AND TRACKING SYSTEM AND METHOD

  • US 20120139704A1
  • Filed: 12/01/2011
  • Published: 06/07/2012
  • Est. Priority Date: 04/14/2008
  • Status: Active Grant
First Claim
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1. A method of locating one or more radio frequency identification (RFID) tags comprising:

  • illuminating at least one RFID tag by an exciter;

    receiving information signals from the illuminated at least one RFID tag by a plurality of receive antennas;

    determining a phase derivate for the received information signals from the at least one illuminated RFID tag received by each of the plurality of receive antennas; and

    identifying a location of the at least one RFID tag based on the determined phase derivates of the received information signals.

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