Surface acoustic waver convolver
US5675207A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1996 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | May 22, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/76
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave convolver of the present invention includes, on a surface of a piezoelectric substrate, a pair of comb-like surface acoustic wave excitation electrodes 2 and 3, and a center electrode 4. The excitation electrodes 2 and 3 are disposed opposed to each other at a specified interval while the center electrode 4 having a shorter width than a length of the excitation electrodes 2 and 3 is positioned between the electrodes 2 and 3. The center electrode 4 propagates the surface acoustic waves respectively produced by the excitation electrodes 2 and 3 in reverse directions to each other to obtain a convolution output signal. A pair of reflectors 10 are positioned on opposite sides of a region defined between the excitation electrode 2 and one end of the center electrode 4 with a width equivalent to that of the center electrode 4. Also, a pair of reflectors 11 are positioned on opposite sides of a region defined between the excitation electrode 3 and the other end of the center electrode 4 with a width equivalent to that of the center electrode 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.