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MULTI-PROTOCOL RFID SYSTEM USING BIT-LOCK OR STEP-LOCK SYNCHRONIZATION

  • US 20110279239A1
  • Filed: 05/13/2011
  • Published: 11/17/2011
  • Est. Priority Date: 07/09/2004
  • Status: Active Grant
First Claim
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1. ) An interrogator system to read active RFID transponders and to read backscatter RFID transponders comprising at least two transceivers, each transceiver covering a respective capture zone, the two capture zones being in proximity to each other, wherein said transceivers are adapted to use time division multiplexing to read the active RFID transponders in a first capture zone during a first time period, to then read the active RFID transponders in a second capture zone during a second time period and to simultaneously read the backscatter RFID transponders in both capture zones during a third time period.

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