Method and apparatus for an acoustic wave filter
US5313177A · kind A · utility
34Cited by
21References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1992 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Apr 6, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02921
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low-loss acoustic wave filter includes a piezoelectric substrate, a first strongly unidirectional acoustic wave transducer and a second strongly unidirectional acoustic wave transducer. Each of the first and second strongly unidirectional acoustic wave transducers are acoustically coupled to one another. Each of the first and second strongly unidirectional acoustic wave transducers further comprises an acoustic wave reflector and a weakly unidirectional acoustic wave transducer. The acoustic wave reflector and the weakly unidirectional acoustic wave transducer are coupled to the piezoelectric substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.