| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an antenna configuration for an IC tag which is to be used as a seal of an article case and, even when the article case is illegally opened, secures its communication function to enable a user to inspect illegal opening. <P>SOLUTION: In an IC tag, a matching loop circuit 3 is arranged approximately in the center of a radiating element part 4, and a tamper detection loop circuit 7 is arranged with a predetermined distance from the matching loop circuit 3, then both circuits 3 and 7 are arranged in line symmetry on a substrate 1. The matching loop circuit 3 and the tamper detection loop circuit 7 split at corresponding parts on a symmetrical line 9, and the two split parts exist along the symmetrical line 9 outside of the loops and are interconnected by a pair of connection circuits 5 having slits in the middle. An IC chip 8 is arranged over the slits to electrically connect the matching loop circuit 3 and the tamper detection loop circuit 7. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
