Efficient surface acoustic wave device capable of excitation in plural frequency bands, and signal receiver and communication system utilizing the same
US5477098A · kind A · utility
19Cited by
7References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | May 31, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14552
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave device includes a piezoelectric substrate, a wave guide path provided on the piezoelectric substrate and an interdigital transducer for exciting a surface acoustic wave. The interdigital transducer is provided with plural portions of mutually different pitches of the electrode finger, respectively corresponding to different frequencies. The portions are parallelly arranged along a direction perpendicular to the propagation direction of the surface acoustic wave. The surface acoustic wave generated by the interdigital transducer is entered in concentrated manner into the wave guide path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.