Bulk acoustic wave filter and method for eliminating unwanted side passbands
US7439824B2 · kind B2 · utility
44Cited by
9References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2005 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Mar 1, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02118
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A bulk acoustic wave (BAW) filter (40) is fabricated from thin film bulk acoustic wave resonators and a method eliminates unwanted side passbands. This BAW filter comprises a substrate (14) a resonator section (11) and an acoustic mirror section (12). Further it comprises a detuning component (31) positioned in the resonator section (11) to provide precise passband characteristics and an additional detuning component (41) in the acoustic mirror section (12) to suppress unwanted side-passband characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.