发明授权
US4551695A Surface acoustic device having multistrip coupler comprised of alternate
coupled and uncoupled strips
失效
具有多行耦合器的表面声学装置包括备用耦合和非耦合条
- 专利标题： Surface acoustic device having multistrip coupler comprised of alternate coupled and uncoupled strips
- 专利标题（中）： 具有多行耦合器的表面声学装置包括备用耦合和非耦合条
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申请号： US508546申请日： 1983-06-28
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公开(公告)号： US4551695A公开(公告)日： 1985-11-05
- 发明人: Shigeo Tanji , Noboru Wakatsuki
- 申请人： Shigeo Tanji , Noboru Wakatsuki
- 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： JPX57-111888 19820629
- 主分类号： H03H9/25
- IPC分类号： H03H9/25 ; H03H3/08 ; H03H9/02 ; H03H9/64
摘要：
A surface acoustic wave device comprising a first set of interdigital electrodes that generate surface acoustic waves, a second set of interdigital electrodes that receive and convert surface acoustic waves into electrical signals, and an intermediate electromechanical coupling element provided therebetween. The coupling element comprises a plurality of parallel strips formed on the surface of a piezoelectric substrate such as to receive and change the direction of propagation of the surface acoustic waves, each of these parallel strips being spaced at a predetermined distance from each other and connected therebetween in a given manner to obtain suitable stopband characteristics.
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