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Anti-jamming detector for radio frequency identification systems

  • US 7,202,784 B1
  • Filed: 06/16/2004
  • Issued: 04/10/2007
  • Est. Priority Date: 06/16/2004
  • Status: Active Grant
First Claim
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1. A radio frequency identification (RFID) reader, comprising:

  • a receiver for detecting and receiving signals emitted from one or more RFID devices;

    a signal strength detector for determining strength of a detected signal within a prescribed frequency range typical of frequency ranges used by the RFID device and generating a signal strength detection signal indicating the signal strength; and

    a processor for receiving the signal strength detection signal and determining whether the signal strength detection signal is indicative of detection of a signal strength above a prescribed maximum established to detect jamming signals, the processor being operative to identify a detected signal as a jamming signal if the signal strength detection signal indicates a signal strength above the prescribed maximum, the processor being further operative to select an appropriate response to the jamming signal from a plurality of available responses.

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