发明名称 |
High-frequency communication device |
摘要 |
A high frequency communication device which can reduce undesired electromagnetic coupling inside and outside a box thereof in which circuit parts constituting a transmitter-receiver circuit are contained. Periodic structures (6) are provided on at least a part of a wall constituting a box (1, 4, 5) so that the periodic structures (6) serve as a filter which has a non-propagating frequency band corresponding a frequency band covering an undesired electromagnetic emission inside the box. Thus, undesired electromagnetic emission energy from any electromagnetic emission source can be confined locally to prevent a possible problem of electromagnetic interference. <IMAGE> |
申请公布号 |
EP1049192(A3) |
申请公布日期 |
2002.02.06 |
申请号 |
EP20000108878 |
申请日期 |
2000.04.26 |
申请人 |
HITACHI, LTD. |
发明人 |
KONDOH, HIROSHI;SHINODA, HIROSHI;SEKINE, KENJI |
分类号 |
H05K9/00;H01L23/552;H01P1/16;H01P1/20;H01P1/211;H01P1/212;H01P7/00;H01Q13/08;H04B1/38 |
主分类号 |
H05K9/00 |
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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