发明名称 |
Composite filter, antenna duplexer, and communication apparatus |
摘要 |
A composite filter has a dielectric notch filter; and a first surface acoustic wave filter, wherein an attenuation band of the dielectric notch filter and an attenuation band of the first surface acoustic wave filter have at least a common band portion; and wherein the dielectric substance notch filter and the surface acoustic wave filter are connected cascade. <IMAGE>
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申请公布号 |
EP1298756(A2) |
申请公布日期 |
2003.04.02 |
申请号 |
EP20020022211 |
申请日期 |
2002.10.01 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
ISHIZAKI, TOSHIO;NAKAMURA, HIROYUKI |
分类号 |
H01P1/20;H01P1/213;(IPC1-7):H01P1/20;H03H9/72;H03H9/64 |
主分类号 |
H01P1/20 |
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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