发明名称 |
Loop antenna and contactless IC card read/write apparatus |
摘要 |
To provide a loop antenna capable of attenuating the distant electric field with the attenuation of the magnetic flux in the vicinity of an electromagnetic wave restrained, and a contactless IC card read/write apparatus. A loop antenna 10 has an electromagnetic wave shield 1 over at least one side of the loop antenna, the electromagnetic wave shield 1 comprising a plurality of electric conductors 2, a ground contact 3 for grounding the plurality of electric conductors and a lead wire 4 for connecting the plurality of electric conductors 2 to the ground contact 3. The plurality of electric conductors 2 are electrically connected via the lead wire 4 to the ground contact 3 and the plurality of electric conductors 2 are arranged so that the paths of the respective electric conductors 2 from any of their given points to the ground contact 3 via the lead wire 4 are determined uniformly.
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申请公布号 |
US7070101(B2) |
申请公布日期 |
2006.07.04 |
申请号 |
US20040885723 |
申请日期 |
2004.07.08 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
DEGUCHI FUTOSHI;YOSHINAGA HIROSHI;TANAKA MASAHIKO;HARUYAMA HIROAKI |
分类号 |
B42D15/10;G06K7/08;G06K17/00;H01Q7/04;H01Q17/00;H01Q19/10 |
主分类号 |
B42D15/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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