| 发明名称 |
RADIO TAG AND RADIO TAG COMMUNICATION DISTANCE MODIFICATION METHOD |
| 摘要 |
<p>It is possible to prevent an unauthorized read-out from both active tags and passive tags. Antenna emission is turned on and off by using a switch, or attenuated by using a resistor. A part of the antenna may be chipped. With these configurations, it is possible to lower the emission level of the antenna thus preventing an unauthorized read-out of important information from a remote reader.</p> |
| 申请公布号 |
EP1760900(A1) |
申请公布日期 |
2007.03.07 |
| 申请号 |
EP20050750723 |
申请日期 |
2005.06.10 |
| 申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
NAGATA, MINEHISA;TAGIRI, SATOSHI;USUKI, IZUMI;KEMI, SHINYA;NIIMI, HIROAKI;KUHARA, SHUNSUKE |
| 分类号 |
H04B1/59;G06K7/00;G06K17/00;G06K19/07;G06K19/073;G06K19/077;H04B5/02 |
主分类号 |
H04B1/59 |
| 代理机构 |
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