Ladder-type filter, duplexer, and module
US9941859B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 2016 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Apr 28, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/706
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A ladder-type filter includes: one or more series resonators connected in series between an input terminal and an output terminal; one or more parallel resonators connected in parallel between the input terminal and the output terminal; divided parallel resonators formed by serially dividing at least one parallel resonator of the one or more parallel resonators; and an inductor of which a first end is coupled to a first node located in a path from the input terminal to the output terminal through the one or more series resonators, and of which a second end is coupled to a second node located between the divided parallel resonators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.