| 摘要 |
PROBLEM TO BE SOLVED: To provide a dual IC card that has a low Q value of a resonance circuit while electromagnetically connecting an IC module to an antenna and that obtains stable communication quality.SOLUTION: A dual IC card comprises: an IC module having a contact terminal part, a connection coil, and an IC chip with a contact type communication function and a non-contact type communication function; an antenna 4 having a connecting coil part 4A and a main coil part 4B; and a tabular card body 2 arranged with the antenna 4. The antenna 4 is formed with the connecting coil part 4A and the main coil part 4B along a spiral coil wiring pathway determining inductance for each of the connecting coil part 4A and the main coil part 4B. Wiring is provided that has a line length longer than that of a zone on a coil wiring pathway of at least one of the connecting coil part 4A and the main coil 4B. A resistance increase part B3a is formed in which electric resistance has been increased in comparison with a case of connection using wiring that has the same cross-sectional area and the same material as the wiring. |
