RESPONSE DEVICE IN AC CARD COMMUNICATION SYSTEM

摘要

An IC card (80) has a communication module buried in a core member (30). In order to facilitate the assembly work of the module (20), contact terminals (24), an antenna (60) and an IC chip (82) are mounted on one board (22). The contact terminals (24) are formed on the upper surface of the board (22) as to be exposed from an opening (26a) of a surface layer (26). In order to make the assembly compact, the antenna (60) and the IC chip (82) are so provided on the lower surface of the board (22) opposite to the contact terminals (24). The IC chip (82) adjusts the resonance frequency of the antenna (60) automatically so as to maximize the output from the antenna (60).