| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive radio tag that easily demonstrates its performance even when a matter existing near an antenna changes. <P>SOLUTION: The radio tag includes a first antenna connected to an IC chip and a second antenna unconnected to the first antenna and arranged at a position where the second antenna changes a resonance frequency of the first antenna and can be separated from the first antenna. The first antenna and the second antenna are designed so as to be able to sufficiently demonstrate performance when attached to a first matter before separating the second antenna and when attached to a second matter after being separated from the second antenna. <P>COPYRIGHT: (C)2008,JPO&INPIT |
