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RFID material tracking method and apparatus

  • US 6,714,121 B1
  • Filed: 08/09/1999
  • Issued: 03/30/2004
  • Est. Priority Date: 08/09/1999
  • Status: Expired due to Fees
First Claim
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1. An identification system, comprising:

  • a plurality of identification tags each attachable to an item to be identified;

    a plurality of sensing antennas embedded within or upon one or more nesting stations that provide an identification tag location for each of the sensing antennas, the plurality of sensing antennas separate from the plurality of identification tags, each sensing antenna configured as a coil antenna coupled to a capacitor to form a tank circuit, each sensing antenna and its capacitor that forms a tank circuit in close proximity to each other; and

    an interrogator having drive electronics and detection circuitry, the interrogator operatively attached to the sensing antennas to excite a single sensing antenna at a time, each sensing antenna polling its respective identification tag location to obtain information from an identification tag at the respective identification tag location through the sensing antenna when the sensing antenna is within a predetermined range of the identification tag.

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