Split-ladder band N77 filter using transversely-excited film bulk acoustic resonators
US11916539B2 · kind B2 · utility
1Cited by
62References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2021 |
| Grant date | Feb 27, 2024 |
| Priority date | — |
| Expiry date | Oct 31, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2003/023
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Band N77 bandpass filters include a first plurality of transversely-excited film bulk acoustic resonators (XBARs) on a first chip comprising a first rotated YX-cut lithium niobate piezoelectric plate having a thickness less than or equal to 535 nm, and a second plurality of XBARs on a second chip comprising a second rotated YX-cut lithium niobate piezoelectric plate having a thickness greater than or equal to 556 nm. A circuit card is coupled to the first chip and the second chip. The circuit card includes conductors for making electrical connections between the first chip and the second chip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.