Filtering circuit with coupled acoustic resonators
US8188811B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 13, 2009 |
| Grant date | May 29, 2012 |
| Priority date | — |
| Expiry date | Apr 10, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A filter with coupled resonator having a substrate; an acoustic mirror intended to support acoustic resonators, and to isolate these resonators from the substrate; a first structure with an upper resonator and a lower resonator coupled to one another through at least one layer of acoustic coupling; a second structure with an upper resonator and a lower resonator coupled to one another through at least one layer of acoustic coupling; the lower resonators of the first and second structure having the same electrodes. The first and second structures are connected via a fifth resonator for which electrodes and the piezoelectric layer of the lower resonators are of the first and second structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.