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Extended range RF-ID transponder

  • US 5,270,717 A
  • Filed: 03/26/1992
  • Issued: 12/14/1993
  • Est. Priority Date: 03/26/1992
  • Status: Expired due to Fees
First Claim
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1. An extended range transponder/interrogator RF-ID arrangement comprising:

  • an interrogator for transmitting an interrogation signal;

    a transponder located on an object for generating a transponder response signal;

    an antenna located along one dimension of said object for receiving said interrogation signal and for transmitting said transponder response signal; and

    a coupling coil connected to said antenna for coupling said interrogation signal from said antenna to said transponder and for coupling said transponders response signal from said transponder to said antenna.

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