Surface acoustic wave device improved in convolution efficiency, receiver using it, communication system using it, and method for producing surface acoustic wave device improved in convoluting efficiency
US5708402A · kind A · utility
33Cited by
7References
13Claims
0Family size
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Key dates
| Filing date | Sep 26, 1995 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Sep 26, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06G7/195
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave device includes a substrate having piezoelectricity, at least two input electrodes, provided on the substrate, for exciting first and second surface acoustic waves, and an output electrode for taking a convolution signal of the two surface acoustic waves out. The substrate has a roughness configuration on a back face thereof and a maximum depth of the roughness configuration is not less than a wavelength of bulk waves of convolution output taken out of the output electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.