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Multi-protocol RFID system

  • US 10,733,393 B2
  • Filed: 09/18/2019
  • Issued: 08/04/2020
  • Est. Priority Date: 07/09/2004
  • Status: Active Grant
First Claim
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1. An interrogator system to read active Radio Frequency Identification (RFID) transponders and backscatter RFID transponders at a single monitoring location comprising:

  • first and second antennas,wherein said system is configured to establish a tag communication signal sequence, said signal sequence comprising first, second, third and fourth sequence portions,said signal sequence being arranged to enable said system to;

    read a first active RFID transponder during said first sequence portion,read a second active RFID transponder during said second sequence portion, andread a third active RFID transponder during said third sequence portion,wherein communication with at least two backscatter RFID transponders during said fourth sequence portion via said first and second antennas overlaps in time.

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