发明授权
- 专利标题： Surface-acoustic-wave device having an improved pass-band characteristic and an improved degree of freedom for setting input and output impedances
- 专利标题（中）： 表面声波装置具有改善的通带特性和提高设定输入和输出阻抗的自由度
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申请号： US760097申请日： 1996-12-03
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公开(公告)号： US5963114A公开(公告)日： 1999-10-05
- 发明人: Masanori Ueda , Gou Endoh , Osamu Kawachi , Yoshiro Fujiwara
- 申请人： Masanori Ueda , Gou Endoh , Osamu Kawachi , Yoshiro Fujiwara
- 申请人地址： JPX Kawasaki
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： JPX Kawasaki
- 优先权： JPX8-133675 19960528
- 主分类号： H01L41/09
- IPC分类号： H01L41/09 ; H03H9/00 ; H03H9/10 ; H03H9/145 ; H03H9/25 ; H03H9/64
摘要：
A surface-acoustic-wave device includes at least first and second surface-acoustic-wave elements formed on a common piezoelectric substrate and cascaded with each other, each of the first and second surface-acoustic-wave elements including a plurality of interdigital electrodes having a plurality of electrode fingers overlapping with each other in correspondence to a path of a surface acoustic wave on the piezoelectric substrate, wherein the width of overlapping of the electrode fingers is changed between the first surface-acoustic-wave element and the second surface-acoustic-wave element.
公开/授权文献
- US4647733A Adjustable ratio transmission switch 公开/授权日：1987-03-03
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