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Excess radio-frequency (RF) power storage in RF identification (RFID) tags, and related systems and methods

  • US 10,032,102 B2
  • Filed: 03/15/2013
  • Issued: 07/24/2018
  • Est. Priority Date: 10/31/2006
  • Status: Active Grant
First Claim
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1. A radio-frequency identification (RFID) tag, comprising:

  • an integrated circuit (IC);

    an antenna electrically coupled to the IC, the antenna configured to receive RF power from received wireless RF signals;

    an energy storage device coupled to the IC;

    a power manager configured to receive the RF power received by the antenna;

    the power manager further configured to;

    operate the IC with the received RF power if the received RF power meets or exceeds an operational threshold power for the IC; and

    store excess energy derived from excess received RF power in the energy storage device if the received RF power exceeds the operational threshold power for the IC; and

    one or more data communications conductors in electrical contact with the IC and configured to releasably interconnect with one or more data communication conductors of a second RFID tag;

    wherein the IC is further configured to exchange data with a second IC of the second RFID tag when the one or more data communications conductors are releasably interconnected with the one or more data communications conductors of the second RFID tag.

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