| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a small metal RFID tag allowing reduction of a risk degree of being erroneously read from the outside by increasing sensitivity only in time of access and extremely reducing the sensitivity in time except it. <P>SOLUTION: A resonance implement is made to be a folding type like a small metal RFID 800A provided with openable/closable folding antennas 83a, 83b(d) or a folding shutter/antenna-equipped small metal RFID 800S provided with openable/closable shutter-equipped folding antennas 82a, 82b(e). The antennas are spread only in time of the access to increase the sensitivity and to allow reading from the outside, and the antennas are folded in time except it to extremely reduce the sensitivity and to reduce the risk degree of being erroneously read from the outside. If using a folding antenna (e) with a shutter shutting off an electromagnetic wave, communication with the outside can be shut off by folding the antenna. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
