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    • 4. 发明申请
    • Antenna for reader/writer and reader/writer having the antenna
    • 具有天线的读写器和读写器天线
    • US20050162331A1
    • 2005-07-28
    • US10500457
    • 2003-01-17
    • Takanori EndoSeirou YahataTakashi Tsuchida
    • Takanori EndoSeirou YahataTakashi Tsuchida
    • G06K17/00G06K7/08G06K7/10H01Q1/22H01Q1/52H01Q7/06H04B1/59H04B5/02H01Q7/08
    • G06K7/10346G06K7/10336G06K19/07771H01Q1/22H01Q1/2216H01Q1/52H01Q7/06
    • A soft magnetic member (5) which is formed by a composite of an organic object such as a metal grain powder, a flake, a ferrite grain powder, a ferrite, an amorphous film or a layered member of the amorphous film with 10 mm or lower thickness so as to satisfy a predetermined relationship with an antenna area, a circumference length, and a magnetic transmission ratio and a conductive member (7) which has approximately 10×10−8 Ωm or lower, more preferably 0.005 Ω or lower initial resistance are provided between the an antenna coil which is formed at least one loop and a metal surface (6) of the conductive member such as a metal casing. The magnetic flux which invades into the conductive object is blocked by the soft magnetic member (5) and the conductive member (7) so as to restrict the influence thereof. By doing this, it is possible to provide a reader/writer antenna for an RFID system in which it is possible to restrict a variance of a resonating frequency and an increase in a loss even if it is disposed so as to contact the conductive object such as a metal casing.
    • 一种软磁体(5),其由诸如金属颗粒粉末,薄片,铁素体粉末,铁氧体,非晶膜或无定形薄膜的层状构件的有机物质的复合物形成,其厚度为10mm或 与天线面积,圆周长度和磁传动比一致的预定关系,以及具有大约10×10 -8Ω以下的更优选的0.005以下的导电构件(7) 在形成至少一个环的天线线圈和诸如金属壳体的导电构件的金属表面(6)之间提供了Ω或更低的初始电阻。 侵入导电物体的磁通量被软磁体(5)和导电部件(7)阻挡,从而限制其影响。 通过这样做,可以提供一种用于RFID系统的读/写天线,其中可以限制谐振频率的变化和损耗的增加,即使它被布置成接触导电物体,例如 作为金属外壳。
    • 6. 发明授权
    • Antenna coil, and RFID-use tag using it, transponder-use antenna
    • 天线线圈和使用它的RFID使用标签,应答器使用天线
    • US07088304B2
    • 2006-08-08
    • US10490704
    • 2002-09-26
    • Takanori EndoSeirou YahataTakashi TsuchidaTadashi Yonezawa
    • Takanori EndoSeirou YahataTakashi TsuchidaTadashi Yonezawa
    • H01Q7/08
    • H01Q1/2225G06K19/0726G06K19/07749G06K19/07771G06K19/07779G06K19/07783H01Q1/22H01Q1/38H01Q7/00H01Q7/06H01Q9/27
    • An antenna coil includes an air-core coil wound helically in a plane and a plate magnetic core member inserted in the air-core coil to be approximately parallel with a plane of the air-core coil. The magnetic core member is formed by a soft magnetic metal, an amorphous or ferrite, or a composite member of a powder, flake and plastic, or rubber. The magnetic core member is formed by performing an injection molding operation or a compressing molding operation of the composite member. Alternatively, the magnetic core member is a magnetic coating formed by applying and drying the composite member. A non-magnetic conductive plate that has a conductivity is layered on a surface of the air-core coil through which the magnetic core member is inserted. The conductive plate is made of a copper, a copper alloy, an aluminum or an aluminum alloy having 0.01 to 2 mm thickness. The antenna coil is operated by relatively high frequency while it is rigid relatively.
    • 天线线圈包括在平面中螺旋地卷绕的空芯线圈和插入空心线圈中的板状磁芯构件,以与空心线圈的平面大致平行。 磁芯构件由软磁金属,非晶体或铁氧体,或粉末,薄片和塑料或橡胶的复合构件形成。 通过进行复合构件的注射成型操作或压缩成型操作来形成磁芯构件。 或者,磁芯构件是通过施加和干燥复合构件而形成的磁性涂层。 具有导电性的非磁性导电板层叠在空芯线圈的插入磁芯部件的表面上。 导电板由厚度为0.01〜2mm的铜,铜合金,铝或铝合金制成。 天线线圈相对较硬时,频率相对较高。
    • 8. 发明授权
    • Anti-theft tag
    • 防盗标签
    • US5912622A
    • 1999-06-15
    • US925162
    • 1997-09-08
    • Takanori EndoMasami MiyakeSeiro Yahata
    • Takanori EndoMasami MiyakeSeiro Yahata
    • B62H5/20G08B13/24G08B13/14
    • G08B13/2414B62H5/20G06K19/07749G06K19/07771G08B13/2437G08B13/2442Y10T29/49155
    • An anti-theft tag which when attached to an article containing a conductive surface properly transmits a signal to a control device to generate an alarm if the article has been taken without permission. The anti-theft tag includes a resonance circuit and a soft magnetic material disposed between an attaching face of the article and the resonance circuit. The soft magnetic material allows the anti-theft tag to provide a resonance frequency which is independent of the material the anti-theft tag is attached to. The soft magnetic material may be composed of, for example, any one of an amorphous alloy, PERMALLOY, electromagnetic soft iron, silicon steel sheet, sendust alloy, Fe--Al alloy, and soft magnetic ferrite. The soft magnetic material may also be a composite material of soft magnetic material flakes and a plastic.
    • 防盗标签当被附着到包含导电表面的物品上时,正确地将信号发送到控制装置,以在没有许可的情况下取出物品时产生警报。 防盗标签包括设置在物品的连接面和谐振电路之间的谐振电路和软磁性材料。 软磁材料允许防盗标签提供独立于防盗标签附着的材料的共振频率。 软磁性材料可以由例如非晶合金,PERMALLOY,电磁软铁,硅钢板,铁硅铝合金,Fe-Al合金和软磁铁氧体中的任一种构成。 软磁性材料也可以是软磁性薄片和塑料的复合材料。