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Ultra high frequency radio frequency identification tag

  • US 7,215,295 B2
  • Filed: 10/25/2005
  • Issued: 05/08/2007
  • Est. Priority Date: 12/23/2003
  • Status: Expired due to Fees
First Claim
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1. A radio frequency identification (“

  • RFID”

    ) tag, comprising;

    a dielectric substrate;

    an antenna attached to the dielectric substrate; and

    an integrated circuit coupled to the antenna,wherein the antenna comprises;

    i) a dipole antenna element comprising two conductors having lengths that set an operating frequency range of the antenna; and

    ii) a second antenna element coupled to the conductors of the dipole antenna element that substantially balances an impedance of the antenna with an input impedance of the integrated circuit without substantially affecting the operating frequency of the antenna.

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