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SELF-STEERING RFID TAGS

  • US 20170200029A1
  • Filed: 12/31/2015
  • Published: 07/13/2017
  • Est. Priority Date: 12/31/2015
  • Status: Active Grant
First Claim
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1. A passive antenna device comprising:

  • a first main antenna element configured to receive an unmodulated wireless signal;

    a power harvester configured to obtain power from the unmodulated wireless signal;

    a plurality of distributed antenna elements;

    a main switch coupled to the power harvester and powered by the obtained power, the main switch configured to place the passive antenna device in an active mode;

    a main circuit powered by the obtained power while in the active mode; and

    a control unit configured to select a combination of the plurality of distributed antenna elements to provide a non-symmetric radiation pattern for the antenna device while responding to an RFID reader.

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