Surface acoustic wave resonator device
US4340834A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1980 |
| Grant date | Jul 20, 1982 |
| Priority date | — |
| Expiry date | Aug 27, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14552
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
This disclosure concerns surface acoustic wave resonator devices having grating reflectors. The resonator comprises a substrate of piezoelectric material, an input interdigital transducer which converts electrical energy to surface acoustic wave energy, an output interdigital transducer which converts surface acoustic wave energy to electrical energy, first and second grating reflectors arranged in spaced aligned relationship on opposite ends of the substrate with the input transducer and the output transducer interposed therebetween the input transducer and the output transducer. The first grating reflector, whose aperture length is the same effective length as the input and output transducers, comprises a first group of interconnected parallel spaced conductors, a second group of interconnected parallel spaced conductors and at least one of isolated parallel conductors positioned between the first and second group of conductors. Each conductor of the one group is aligned with a corresponding conductor of the first group and a corresponding conductor of the second group. Each conductor of the first and second group is parallel and electrically interconnected. The second grating re…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.