Group single-phase unidirectional transducers with 3/8.lambda.and 5/8.lambda. sampling
US5073763A · kind A · utility
21Cited by
7References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1990 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Nov 2, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14552
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Novel GSPUDT structures are disclosed with 3/8.lambda. and 5/8.lambda. group sampling with 3.lambda. and 5.lambda. group responses. Reflectionless or unidirectional transducers, and broadband notch elements are all implementable with these new configurations. These GSPUDTs are similar to the conventional SPUDT and the "Hopscotch" transducers in that single level versions are reflectionless. Unidirectional characteristics are only obtainable from a two-level structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.