Reduced coupling saw filter
US5952765A · kind A · utility
12Cited by
10References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1996 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Nov 26, 2016 |
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.