HF BAND WIRELESS COMMUNICATION DEVICE

摘要

Provided is an HF band wireless communication device whereby the necessary communication distance is ensured, power loss is minimal, and resonant frequency is stable. This HF band wireless communication device is provided with: a wireless IC (10) for processing of wireless signals; a first substrate (20) having a first inductor pattern (21) connected to the wireless IC (10); and a second substrate (30) having a second inductor pattern (31) series-connected to the first inductor pattern (21). The first inductor pattern (21) has an L value greater than the L value of the second inductor pattern (31), the resonant frequency of the resonant circuit which includes the first and second inductor patterns (21), (31) being governed by the L value of the first inductor pattern (21). The second inductor pattern (31) has a winding diameter greater than the winding diameter of the first inductor pattern (21), and the second inductor pattern (31) functions as the main radiating element.