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Phase ranging RFID location system

  • US 8,493,182 B2
  • Filed: 10/16/2009
  • Issued: 07/23/2013
  • Est. Priority Date: 10/16/2009
  • Status: Active Grant
First Claim
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1. An RFID location system, comprising:

  • an RFID reader module coupled to a steerable phased array antenna directed by a beam steering unit;

    the RFID reader module outputting a data set including a tag identifier, a frequency and a phase;

    the RFID reader module including a transceiver with multiple frequency transmit and receive capability;

    a location processor receiving the data set and a beam direction parameter;

    the location processor outputting a three dimensional location of an RFID tag associated with the tag identifier.

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