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Electromagnetic wave lane marker, device for detecting electromagnetic wave lane marker, and traffic system

  • US 6,577,246 B1
  • Filed: 04/21/2001
  • Issued: 06/10/2003
  • Est. Priority Date: 05/25/1999
  • Status: Expired due to Fees
First Claim
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1. An electromagnetic lane marker comprising;

  • an electronic resonator comprising a cyclic coil connected to a capacitor, said electronic resonator resonates an inductive electromagnetic wave of a first frequency; and

    a frequency conversion circuit coupled to said electronic resonator, said frequency conversion circuit converts the electromagnetic wave of the first frequency to an electromagnetic wave of a second frequency and transmits the electromagnetic wave of the second frequency, said second frequency being different from said first frequency.

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