Electrical filters including coupled resonators
US4065735A · kind A · utility
14Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1976 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Jan 12, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6446
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave band-pass filter comprising a piezoelectric substrate having on one surface first and second SAW resonators tuned to the same frequency and coupled together. An input transducer is coupled to the first resonator and an output transducer is coupled to the second resonator. Each resonator is preferably formed by two spaced apart aligned grating reflectors and the two resonators are preferably coupled by an array of discrete parallel metallic strips extending between the two cavity resonators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.