Reduced coupling saw filter
US6051908A · kind A · utility
2Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1999 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Mar 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14505
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A relatively narrow fractional bandwidth saw filter formed on a standard ST cut of quartz. The electrode pattern is modified in order to eliminate distortion. In particular, the overlap pattern is formed with one or less active overlaps per wavelength in those regions of the SAW filter where the weighing function is maximum. A plurality of six finger/.lambda. electrode patterns with two active overlaps per wavelength is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.