| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an RFID system which is made to be lightweight, is low cost and excellent in productivity, and has less variation in resonant frequency and less loss. <P>SOLUTION: An antenna device 1 in an RFID system for performing data communication in non-contact has a configuration in which a planar soft magnetic body 5 is provided between an antenna and a metal surface on the back surface. In this configuration, the soft magnetic body 5 is formed of an aggregate of a plurality of magnetic pieces 9, thereby improving productivity and communication characteristics. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
