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RFID systems using distributed exciter network

  • US 8,395,482 B2
  • Filed: 03/24/2008
  • Issued: 03/12/2013
  • Est. Priority Date: 03/23/2007
  • Status: Active Grant
First Claim
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1. An RFID system configured to manipulate RFID tags, comprising:

  • an RFID receiver system configured to detect information from RFID tags within a receive coverage area; and

    a plurality of exciters defining a plurality of interrogation spaces within the receive coverage area of the RFID receiver system;

    wherein the RFID receiver system is configured to transmit a control signal that identifies one of the plurality of exciters and includes information indicative of an RFID tag interrogation signal;

    wherein the plurality of exciters are configured to receive the control signal;

    wherein the exciter identified in the control signal is configured to illuminate an interrogation space with the RFID tag interrogation signal;

    the RFID receiver system is configured to transmit a status signal at a first RF frequency that identifies one of the plurality of exciters;

    the exciter is configured to extract at least the identity of the exciter identified by the status signal; and

    the exciter is configured to generate a response signal and transmits the response signal at a second RF frequency.

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