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POWERING RFID TAGS USING MULTIPLE SYNTHESIZED-BEAM RFID READERS

  • US 20160042206A1
  • Filed: 03/13/2014
  • Published: 02/11/2016
  • Est. Priority Date: 03/14/2013
  • Status: Active Grant
First Claim
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1. A method for inventorying a Radio Frequency Identification (RFID) tag comprising:

  • communicating, from a controller, a target location to a first synthesized-beam RFID reader and to a second synthesized-beam RFID reader,steering, responsive to the communicated target location, a first beam from the first synthesized-beam reader to the target location and a second beam from the second synthesized-beam reader to the target location;

    transmitting, simultaneously, from the first synthesized-beam reader a modulated RF inventory signal and from the second synthesized-beam reader a substantially unmodulated RF signal;

    receiving, responsive to the modulated RF inventory signal, a tag reply at one of the first and second synthesized-beam readers; and

    transmitting, from one of the first and second synthesized-beam readers, a modulated RF acknowledgment signal responsive to the tag reply, and from the other of the first and second synthesized-beam readers a substantially unmodulated RF signal.

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