Surface acoustic wave device for generating an output signal with only a symmetric or only an asymmetric vibration mode acoustic wave
US5374908A · kind A · utility
11Cited by
14References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1992 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Nov 25, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6463
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave device for generating an output signal with only a symmetric or only an asymmetric vibration acoustic wave mode in a piezoelectric substrate. The device has first and second transversely spaced transducers and the device is driven from both the first and second transducers. A third transducer is between and acoustically coupled to the first two transducers. The electrodes of all three transducers are arranged with respect to each other so as to cause only a symmetrical acoustic vibration mode or only an asymmetrical acoustic vibration mode in the piezoelectric substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.