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Wireless IC device

  • US 8,960,557 B2
  • Filed: 10/13/2010
  • Issued: 02/24/2015
  • Est. Priority Date: 05/21/2008
  • Status: Active Grant
First Claim
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1. A wireless integrated circuit device comprising:

  • a wireless integrated circuit arranged to process a radio signal;

    a power-supply circuit board connected to the wireless integrated circuit and including a power supply circuit including a coil pattern; and

    a radiation plate arranged to radiate a transmission signal supplied from the power-supply circuit board or to receive a reception signal to supply the reception signal to the power-supply circuit board;

    whereinthe coil pattern includes a plurality of annular conductors arranged in a helical pattern;

    the radiation plate includes an opening provided in a portion thereof and a slit connected to the opening and, when viewed in plan from a direction of a winding axis of the coil pattern, the opening in the radiation plate overlaps with at least a portion of an inner area of the coil pattern and the coil pattern overlaps with at least a portion of the radiation plate surrounding the opening; and

    the slit extends from and connects the opening of the radiation plate to an outer edge of the radiation plate.

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