Patent ID: 8810456
Filing Date: 2014-08-19
Classification: H01Q

Abstract:
1. A wireless IC device, comprising a wireless IC; a power feeding circuit coupled with the wireless IC and including a resonant circuit and/or a matching circuit including at least two inductance elements; and a radiation plate arranged to radiate a transmission signal supplied from the power feeding circuit and/or supply a received signal to the power feeding circuit; wherein the at least two inductance elements are spiral shaped and wound in directions opposite to each other and winding axes of each of the at least two individual inductance elements are disposed at different positions; and the radiation plate includes two spiral-shaped coupling units, the spiral-shaped coupling units are disposed in a vicinity of the at least two inductance elements so that spiral surfaces thereof are nearly perpendicular to the winding axes of the at least two inductance elements, respectively, and the spiral-shaped coupling units are wound in directions opposite to the winding directions of the at least two inductance elements adjacent to the spiral-shaped coupling units, respectively.