Filter with surface acoustic wave resonators
US6344705B1 · kind B1 · utility
23Cited by
34References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2000 |
| Grant date | Feb 5, 2002 |
| Priority date | — |
| Expiry date | Aug 7, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/1455
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A filter with surface acoustic wave resonators using an equivalent electrical bridge structure to obtain a good form relationship, i.e., a relationship between the filter rejection band and its pass band. Bridge arms advantageously include the paralleling of several resonators, thereby not requiring additional electrical elements as in the background art which provides for the use of series-connected resonators. Particular implantation methods for preparing equivalent structures to paralleling several resonators are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.