| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a noncontact type IC card which is not influenced by and does not influence a plurality of noncontact type IC cards or a metal-like object even when the plurality of noncontact type IC cards exist within an area where a reader writer gives and receives information or when the metal-like object exists nearby. <P>SOLUTION: The noncontact type IC card composes a resonance circuit including an antenna circuit and a matching circuit with a high dielectric resonator 6. Since the high dielectric resonator 6 has properties that an electromagnetic field occurring in resonance concentrates inside and rarely leaks outside, its resonance circuit does not influence a resonance circuit of other noncontact type IC cards which exists in the reader writer's information giving receiving area or change a resonance frequency by having influences from external objects such as other noncontact type IC cards or metals. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
