Surface acoustic wave device with reflection electrodes having pitches that vary
US7002438B2 · kind B2 · utility
7Cited by
4References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2004 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Aug 25, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02803
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave device includes: a substrate; a pair of reflection electrodes that are formed on the substrate; and drive electrodes that are interposed between the reflection electrodes. In this surface acoustic wave device, the pitches in each of the reflection electrodes vary according to a predetermined variation pattern. With this structure, the suppression on spurious signals and the shape factor (the sharpness of the cut-off region of the pass band) can be improved at the same time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.