×

VARIABLE FREQUENCY RADIO FREQUENCY IDENTIFICATION (RFID) TAGS

  • US 20070057797A1
  • Filed: 11/02/2006
  • Published: 03/15/2007
  • Est. Priority Date: 04/08/2004
  • Status: Active Grant
First Claim
Patent Images

1. A radio-frequency identification (RFID) tag comprising:

  • a main antenna tuned to a first resonant frequency;

    switching circuitry that selectively changes the resonant frequency of the main antenna; and

    an RFID integrated circuit electrically coupled to the main antenna that stores information relating to an article associated with the RFID tag and communicates the information to an RFID reader via the main antenna, wherein the switching circuitry comprises a low-power switch that requires less power to switch positions than is necessary for the RFID integrated circuit to communicate the information to the RFID reader.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×