Transversely-excited film bulk acoustic resonator matrix filters with switches in parallel with sub-filter shunt capacitors
US11955951B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Sep 19, 2022 |
| Grant date | Apr 9, 2024 |
| Priority date | — |
| Expiry date | Sep 19, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/706
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There are disclosed matrix filters having an input port and sub-filters connected between the input port and respective output ports. Each of the sub-filters includes a ladder circuit with n transversely-excited film bulk acoustic resonator (XBAR) series elements and n−1 capacitor shunt elements, where n, the order of the sub-filter, is an integer greater than 2. Each sub-filter further has a first switch in parallel with a first capacitor shunt element and a second switch in parallel with a last capacitor shunt element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.