| 发明名称 |
READER/WRITER AND AUTOMATIC TICKET CHECKER FOR CHECKING TICKET BY READER/WRITER |
| 摘要 |
<p>An antenna device for preventing communication failure by reducing the sub communicatable region formed around an antenna coil portion of a reader/writer. The antenna device (200) is provided to a reader/writer (20) for information communication between an IC card (10) and signal processing circuits (210, 220) through an electromagnetic wave. The antenna device (200) is made to relatively approach an antenna coil (100) of the IC card (10) and is composed of an antenna coil portion having a loop antenna (202) formed on the surface of a substrate (201) and a conductor portion (203) formed on the same surface of the substrate outside the antenna coil portion.</p> |
| 申请公布号 |
WO2004025547(A1) |
申请公布日期 |
2004.03.25 |
| 申请号 |
WO2003JP11571 |
申请日期 |
2003.09.10 |
| 申请人 |
SONY CORPORATION;MAEDA, TATSUO;YAMAGATA, AKIHIKO |
发明人 |
MAEDA, TATSUO;YAMAGATA, AKIHIKO |
| 分类号 |
G06K17/00;G06K7/08;G06K7/10;H01Q1/22;H01Q1/38;H01Q7/00;H01Q19/28;H04B5/02;(IPC1-7):G06K17/00 |
主分类号 |
G06K17/00 |
| 代理机构 |
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代理人 |
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