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MULTIPLE FREQUENCY DETECTION SYSTEM

  • US 20100052865A1
  • Filed: 11/12/2009
  • Published: 03/04/2010
  • Est. Priority Date: 01/18/2005
  • Status: Abandoned Application
First Claim
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1. A multiple frequency detection system, comprising:

  • a reader that emits a pulse interrogation signal at a first frequency; and

    a resonant tag that receives the pulse interrogation signal at the first frequency and responds to the pulse interrogation signal by transmitting a first response signal resonated at the first frequency, said resonant tag further transmitting a second response signal resonated at a second frequency offset from the first frequency, said reader further reading both the first and second response signals, and determining a detection of said resonant tag based on a comparison between the first and second response signals.

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