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Method, System, and apparatus for communicating with a RFID tag population

  • US 20020149483A1
  • Filed: 02/12/2002
  • Published: 10/17/2002
  • Est. Priority Date: 02/12/2001
  • Status: Active Grant
First Claim
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1. A radio frequency identification (RFID) tag device, comprising:

  • an antenna;

    a receiver coupled to said antenna, wherein said receiver is configured to receive a symbol from said antenna, and a modulator coupled to said antenna;

    wherein said modulator is configured to receive a response value, and is configured to select one of a plurality of frequencies according to said response value to be a selected frequency signal;

    wherein said modulator is configured to backscatter modulate said received symbol according to said selected frequency signal to produce a backscatter modulated symbol; and

    wherein said antenna is configured to transmit said backscatter modulated symbol.

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