发明公开
EP0458271A2 Elastic surface wave convolva having wave width converting means and communication system using same
失效
弹性表面波与波宽度转换器和传输系统及其使用折叠装置。
- 专利标题： Elastic surface wave convolva having wave width converting means and communication system using same
- 专利标题（中）： 弹性表面波与波宽度转换器和传输系统及其使用折叠装置。
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申请号： EP91108198.2申请日： 1991-05-21
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公开(公告)号： EP0458271A2公开(公告)日： 1991-11-27
- 发明人: Egara, Koichi, c/o CANON KABUSHIKI KAISHA , Mochizuki, Norihiro, c/o CANON KABUSHIKI KAISHA
- 申请人： CANON KABUSHIKI KAISHA
- 申请人地址： 30-2, 3-chome, Shimomaruko, Ohta-ku Tokyo JP
- 专利权人： CANON KABUSHIKI KAISHA
- 当前专利权人： CANON KABUSHIKI KAISHA
- 当前专利权人地址： 30-2, 3-chome, Shimomaruko, Ohta-ku Tokyo JP
- 代理机构： Pellmann, Hans-Bernd, Dipl.-Ing.
- 优先权： JP129302/90 19900521; JP129303/90 19900521; JP135421/90 19900528
- 主分类号： G06G7/195
- IPC分类号： G06G7/195
摘要：
An elastic surface wave convolver comprises a piezoelectric substrate, a plurality of input transducers formed on said substrate for generating elastic surface waves corresponding to respective input signals, a plurality of waveguides provided side by side on a region of the substrate where elastic surface waves radiated from the input transducers overlap, wherein a convolution signal of input signals is produced due to parametric mixing effect of elastic surface waves in respective waveguides, these waveguides generating an elastic surface wave corresponding to the convolution signal, and an output transducer for receiving the elastic surface wave radiated from the waveguides and taking out an electrical signal by conversion of the convolution signal, wherein the width of elastic surface wave radiated from the waveguides is narrower immediately before reception with the output transducer than immediately after radiation from the waveguides.
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