Patent ID: 8590797

Claim:
A wireless integrated circuit device comprising: a wireless integrated circuit arranged to process a radio signal; a power-supply circuit connected to the wireless integrated circuit and 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; wherein the radiation plate includes first and second openings arranged adjacent to one another and provided in a portion thereof and a slit connected to the first opening and, when viewed in plan from a direction of a winding axis of the coil pattern, the first opening in the radiation plate overlaps with at least a portion of an inner area of the coil pattern; the first opening is open to an outside of the radiation plate via the slit; and the second opening is completely surrounded by portions of the radiation plate so as to be closed to an outside of the radiation plate.