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Radio frequency identification (RFID) tag location systems and methods

  • US 20080100439A1
  • Filed: 10/31/2006
  • Published: 05/01/2008
  • Est. Priority Date: 10/31/2006
  • Status: Active Grant
First Claim
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1. A method for locating a radio frequency identification (RFID) tag, comprising:

  • transmitting at least one communication signal from a transmitter at a selected transmit power level to determine a group of one or more tags present within a region and a read rate of a desired RFID tag, the group including the desired RFID tag; and

    performing one or more of the following steps at least once to hone in on a physical location of the desired RFID tag;

    adjusting the transmit power level based at least in part on a number of tags present in the determined group and the read rate,transmitting a subsequent at least one communication signal from the transmitter at the adjusted transmit power level to determine a subsequent group of one or more tags present within a subsequent region and a subsequent read rate of the desired RFID tag, andrepositioning the transmitter.

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