发明名称 |
Surface acoustic wave filter having a weighted reflector with spaced finger groups |
摘要 |
A surface acoustic wave filter has one or more acoustic filter tracks. Each track has an input interdigital converter, an output interdigital converter, and a reflector. The reflector reflects surface waves between the input and output inter-digital converter by 180 DEG . The reflector is formed with a multiplicity of reflector electrode fingers which are combined into reflector finger groups. Mutually adjacent reflector finger groups are spaced apart by a defined spacing distance such that respective signals in adjacent reflector finger groups are superimposed in antiphase.
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申请公布号 |
US5896072(A) |
申请公布日期 |
1999.04.20 |
申请号 |
US19960779943 |
申请日期 |
1996.12.23 |
申请人 |
SIEMENS MATSUSHITA COMPONENTS GMBH & CO. KG |
发明人 |
BERGMANN, ANDREAS;MACHUI, JUERGEN |
分类号 |
H03H9/64;(IPC1-7):H03H9/64 |
主分类号 |
H03H9/64 |
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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