Interdigital transducer for use in a surface acoustic wave filter
US5345135A · kind A · utility
1Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Jan 26, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02992
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An interdigital transducer for use in a surface acoustic wave filter has two busbars of an irregular shape to reduce the effect of internally reflected surface waves. The busbars will usually have an identical shape to one another and have stepped outer and inner edges. The distance between a portion of the outer edge and a corresponding portion of the inner edge can be constant for a particular busbar or that distance can vary. With previous busbars, the outer and inner edges are linear and each busbar has a rectangular shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.