发明名称 |
High-frequency circuit device and transmitter/receiver including the same |
摘要 |
A high-frequency circuit device includes a dielectric substrate (1). A planar conductor (2) is provided on each of top and bottom surfaces (1A,1B) of the dielectric substrate and a slot line (4) is formed on the top surface. Also, undesired-wave propagation preventing circuits (5), each including multistage band-elimination filters (6), are provided on the top surface of the dielectric substrate, with the slot line therebetween. Each of the band-elimination filters includes two conductive lines and a resonator which is provided at a portion of one of the conductive lines and which includes two spiral lines. Accordingly, propagation of an undesired wave of the band whose center is the resonance frequency of the resonator can be prevented. <IMAGE> |
申请公布号 |
EP1339130(A3) |
申请公布日期 |
2004.12.15 |
申请号 |
EP20030004096 |
申请日期 |
2003.02.25 |
申请人 |
MURATA MANUFACTURING CO., LTD. |
发明人 |
MIKAMI, SHIGEYUKI;KOCHI, TETSUYA;MATSUZAKI, HIROYASU;MUKAIYAMA, KAZUTAKA;SAKAMOTO, KOICHI |
分类号 |
H01P1/203;H01P1/16;H01P1/212;H01P3/02;H01P7/00;H03H5/02;(IPC1-7):H01P7/00;H01P3/00;H01P1/162 |
主分类号 |
H01P1/203 |
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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