Filter using transversely-excited film bulk acoustic resonators with inductively coupled sub-resonators
US12255625B2 · kind B2 · utility
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92References
16Claims
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Key dates
| Filing date | Dec 9, 2021 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | Jul 5, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/205
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A filter includes first and second shunt resonators, at least one series resonator connected to the first and second shunt resonators in a ladder filter circuit, and a first ground contact pad. The first shunt resonator has two or more first sub-resonators and the second shunt resonator has two or more second sub-resonators. At least one first sub-resonator and at least one, but less than all, of the two or more second sub-resonators are connected to the first ground contact pad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.