Elastic wave control element using piezoelectric materials
US6548936B2 · kind B2 · utility
0Cited by
9References
20Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 8, 2001 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Aug 8, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B3/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An elastic wave control element includes a piezoelectric material which is inserted into a propagation path for an elastic wave or installed in an oscillator to allow the elastic wave in a selected frequency to be damped, reflected, or transmitted. The piezoelectric material is provided with a pair of electrodes between which a negative capacitance circuit is connected to allow a loss factor of the negative capacitance circuit in a selected frequency or frequency band to be matched with a dielectric loss factor of the piezoelectric material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.