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WIRELESS IC DEVICE AND ELECTRONIC APPARATUS

  • US 20110127337A1
  • Filed: 02/08/2011
  • Published: 06/02/2011
  • Est. Priority Date: 07/17/2007
  • Status: Active Grant
First Claim
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1. A wireless IC device comprising:

  • a wireless IC arranged to transmit and receive signals;

    a feeder circuit substrate including a feeder circuit incorporating an inductance element connected to the wireless IC in a galvanically conductive state and in which a feeder electrode coupled to the inductance element is provided on a surface of the substrate or an inside of the substrate; and

    a radiation plate that is electromagnetically coupled to the feeder electrode, whereinan imaginary portion of an input/output impedance of the wireless IC device conjugates with the imaginary portion of an impedance when viewed from a portion of the feeder circuit substrate, connected to the wireless IC, toward the feeder electrode within or near a range of frequency used.

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