Acoustic surface wave devices
US3955159A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1974 |
| Grant date | May 4, 1976 |
| Priority date | — |
| Expiry date | Sep 13, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14564
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An acoustic surface wave device comprises a launching transducer and a receiving transducer coupled to one surface of a piezoelectric substrate and including means for suppressing spurious signals developed in the receiving transducer due to acoustic surface waves reflected from the ends of the substrate. In one embodiment the electrodes of both transducers are staggered a quarter wavelength at the mid point of their apertures so that waves received direct from the launching transducer arrive in phase at the receiving transducer whereas end reflected waves arrive in antiphase over the two halves of the receiving transducer aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.