Acoustic filter
US10461720B2 · kind B2 · utility
0Cited by
6References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2017 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Feb 16, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6466
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Techniques are disclosed for increasing capacitance, decreasing losses, and/or improving a quality factor of a SAW filter. The techniques include using a partial-IDT instead of a reflector between two groups of IDTs. The partial-IDT is implemented having a cavity transition on a first end and a reflector transition on a second end. The cavity transition facilitates propagation of main-resonance acoustic waves into, or between elements of, the partial-IDT. The reflector transition facilitates reflection of main-resonance acoustic waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.