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发明公开
CN1893181A 天线、及使用该天线的电磁波表、无键输入系统及RFID系统 无效 - 撤回

天线、及使用该天线的电磁波表、无键输入系统及RFID系统
摘要：
本发明的天线，具有：主磁路部件，其将线圈卷绕在磁芯上；以及副磁路部件，其与上述磁芯进行磁连接以使与上述主磁路部件实质性地构成闭合磁路，在将由上述线圈所得到的信号电压S与噪声电压N之间的比作为(S/N)1，将除了没有具有上述副磁路部件之外构成相同的天线的信号电压S与噪声电压N之间的比作为(S/N)0的情况下满足(S/N)1＞(S/N)0。
摘要（英）：

An antenna comprising a magnetic main-path member comprising a coil wound around a magnetic core, and a magnetic sub-path member magnetically connected to the magnetic core for constituting a substantially closed magnetic path with the magnetic main-path member, the antenna meeting the relation of (S/N)1>(S/N)0, wherein (S/N)1 is a ratio of a signal voltage S obtained from the coil to a noise voltage N in this antenna, and (S/N)0 is a ratio of a signal voltage S to a noise voltage N in an antenna having the same structure except for having no magnetic sub-path member.

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