Surface acoustic wave filter
US4047130A · kind A · utility
8Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1976 |
| Grant date | Sep 6, 1977 |
| Priority date | — |
| Expiry date | Aug 27, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/0296
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave filter has a Lithiumniobate substrate of parallelogram configuration, which is bonded to a header having similar acoustic impedance. The substrate has three transducers arranged along its long sides at particular spacings destined to suppress triple transit echoes. The short sides are oblique and surface portions adjacent thereto are covered by surface waves attenuating paddings. Two such filters are cascaded on the same header.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.