Invention Publication
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。
- Patent Title: Elastic surface wave convolva having wave width converting means and communication system using same
- Patent Title (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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Application No.: EP91108198.2Application Date: 1991-05-21
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Publication No.: EP0458271A2Publication Date: 1991-11-27
- Inventor: Egara, Koichi, c/o CANON KABUSHIKI KAISHA , Mochizuki, Norihiro, c/o CANON KABUSHIKI KAISHA
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: 30-2, 3-chome, Shimomaruko, Ohta-ku Tokyo JP
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: 30-2, 3-chome, Shimomaruko, Ohta-ku Tokyo JP
- Agency: Pellmann, Hans-Bernd, Dipl.-Ing.
- Priority: JP129302/90 19900521; JP129303/90 19900521; JP135421/90 19900528
- Main IPC: G06G7/195
- IPC: G06G7/195
Abstract:
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.
Public/Granted literature
- EP0458271A3 Elastic surface wave convolva having wave width converting means and communication system using same Public/Granted day:1992-07-01
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