发明授权
- 专利标题： Surface acoustic wave filter
- 专利标题（中）： 表面声波滤波器
-
申请号： US552410申请日： 1975-02-24
-
公开(公告)号： US3965446A公开(公告)日： 1976-06-22
- 发明人: George Frederick Craven , John Stuart Heeks , Graham Marshall
- 申请人： George Frederick Craven , John Stuart Heeks , Graham Marshall
- 申请人地址： NY New York
- 专利权人： International Standard Electric Corporation
- 当前专利权人： International Standard Electric Corporation
- 当前专利权人地址： NY New York
- 优先权： UK9767/74 19740305
- 主分类号： H03H9/02
- IPC分类号： H03H9/02 ; H03H9/64 ; H03H9/72 ; H03H9/76 ; H03H9/26 ; H03H9/04 ; H03H9/30 ; H03H9/32
摘要：
This invention comprises in combination a body of piezoelectric material, means for propagating an acoustic wave in a first mode, means for converting a portion of the acoustic wave energy into an acoustic wave in a second mode, a resonant structure in which the acoustic wave energy in the second mode is resonant, means for reconverting the acoustic wave energy in the second mode into surface acoustic wave energy in the first mode, means for providing a predetermined phase shift of the reconverted acoustic wave energy relative to the original propagated acoustic wave energy, and means for recovering the combined acoustic wave energy of the original and phase shift reconverted acoustic wave energies as an electric output signal.
公开/授权文献
- US5663882A Method and apparatus for fabricating roofing crickets 公开/授权日：1997-09-02
信息查询
