WIRELESS IC DEVICE AND ELECTRONIC APPARATUS

摘要

To obtain a wireless IC device that can achieve miniaturization, allows simple and low-cost mounting of a wireless IC, and eliminates the possibility of a damage to the wireless IC due to static electricity, and an electronic apparatus equipped with the wireless IC device. A wireless IC device includes a wireless IC chip (5) that processes transmission and reception signals; and a feeder circuit substrate (10) that includes a resonant circuit having an inductance element. Feeder electrodes (19a) and (19b) are provided on a surface of the feeder circuit substrate (10) and are electromagnetically coupled to the resonant circuit. The feeder electrodes (19a) and (19b) are electromagnetically coupled to radiation plates (21a) and (21b) provided for a printed wiring board (20). The wireless IC chip (5) is activated by a signal received by the radiation plates (21a) and (21b), and a response signal from the wireless IC chip (5) is radiated outward from the radiation plates (21a) and (21b).