Acoustic periodic structure
US4150346A · kind A · utility
2Cited by
1References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1977 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Nov 9, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14538
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An acoustic periodic structure for slow wave propagation and filtering having a corrugated surface with traction-free boundaries which can support a horizontally polarized shear surface wave that travels much slower than the bulk shear wave velocity and that exhibits an upper cut-off frequency. Electrodes are located on the tops of the teeth forming the corrugated surface and alternate electrodes are excited out of phase, the distribution of the excitation voltage phases determining the particular mode of resonance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.