Reflectionless transducer
US4902925A · kind A · utility
10Cited by
9References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Mar 15, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02842
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A reflectionless surface acoustic wave transducer is proposed which has first and second opposed conductive transducer pads on a substrate of piezo-electric material. A plurality of groups of n interdigitated .lambda./4 electrodes extend from the opposed pads to form an elongated transducer. Each group of n interdigitated electrodes has a spacing within the group of .lambda./4 and the spaces between adjacent groups of the interdigitated electrodes are .lambda./2 such that adjacent groups cancel reflections from each other thereby establishing a reflectionless surface acoustic wave transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.