发明名称 |
Short-distance communication antenna and methods of manufacturing and using the short-distance communication antenna |
摘要 |
A short-distance communication antenna can satisfactorily transmit and receive an information signal within a regulation range of the radio law. Also, the short-distance communication antenna provided on a card reader/writer enables the card reader/writer to communicate with a non-contacting information card without being limited by the direction of the non-contacting information card upon reception. This short-distance communication antenna includes a plurality of magnetic poles disposed on a magnetic member and to and from which a magnetic flux is transmitted and received, and a coil for transmitting or transmitting and receiving the information signal mounted on at least one of the magnetic poles. Further, the short-distance communication antenna includes a housing having an aperture to and from which a magnetic flux is transmitted and received, and a coil for transmitting or transmitting and receiving the information signal mounted on said housing. Furthermore, there are also provided methods of manufacturing and of using the above short-distance communication antenna. In this case, the most specific feature of this invention is that a magnetic flux of the communication antenna is closed and a communication area is limited.
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申请公布号 |
US5694139(A) |
申请公布日期 |
1997.12.02 |
申请号 |
US19950493818 |
申请日期 |
1995.06.22 |
申请人 |
SONY CORPORATION |
发明人 |
SAITO, SHOSHICHI;FUJIMOTO, MASAHIRO;ORIHARA, KATSUHISA;YANAGIBORI, SUSUMU |
分类号 |
G06K7/08;G06K19/077;H01Q7/04;(IPC1-7):H01Q11/12 |
主分类号 |
G06K7/08 |
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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