Bulk acoustic wave filter with reduced second harmonics generation
US12028050B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 2021 |
| Grant date | Jul 2, 2024 |
| Priority date | — |
| Expiry date | Sep 7, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/568
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus includes a first filter and a second filter. The first filter generally comprises a first plurality of resonators. The second filter generally comprises a second plurality of resonators. The first plurality of resonators generally comprise piezoelectric material. The second plurality of resonators generally comprise piezoelectric material. At least two of the first plurality of resonators are arranged in series between a signal input of the first filter and a signal output of the first filter. At least two of the second plurality of resonators are arranged in series between a signal input of the second filter and a signal output of the second filter. The second plurality of resonators are reverse connected relative to the first plurality of resonators. The first filter is generally connected in parallel with the second filter such that (a) the signal input of the first filter is connected to the signal input of the second filter, (b) the signal output of the first filter is connected to the signal output of the second filter, and (c) second harmonic emissions of the first filter are substantially canceled by second harmonic emissions of the second filter. The apparatus…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.