Acoustic surface-wave filter
US4054851A · kind A · utility
10Cited by
4References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1974 |
| Grant date | Oct 18, 1977 |
| Priority date | — |
| Expiry date | Dec 17, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6446
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An acoustic surface-wave filter comprises an element which is excitable to perform surface oscillations, which is formed at least partly of piezoelectric material and has interference locations for the surface wave on its surface together with electromechanical converter means, at least some of the interference locations forming a resonator with the average spacing of the interference locations being equal to a half of the wavelength of the surface waves or a whole number multiple of a half of the wavelength of the surface waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.