Surface wave devices with tapered transducers
US6023122A · kind A · utility
20Cited by
8References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1999 |
| Grant date | Feb 8, 2000 |
| Priority date | — |
| Expiry date | Apr 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14547
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A SAW device has tapered trasnsducers each of which is divided into two or more tapered transducer parts, which are arranged in line with one another in one or more SAW tracks with the tapers of adjacent tapered transducer parts complementary to one another to provide a compact arrangement. The tapered transducer parts can be symmetrically or asymmetrically tapered to provide different frequency bands for band or bandwidth switching of the SAW device. Input and output impedances of the SAW device can be maintained during such switching by switching of dummy transducer parts also provided on the same piezoelectric substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.