Bulk acoustic wave filter of ladder-type structure
US8508316B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 2010 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Nov 4, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/605
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A bulk acoustic wave filter of a ladder-type structure includes a series arm and at least a series arm resonator which is disposed in the series arm, such that the series arm is distributed in series arm sections between an input terminal and an output terminal. The bulk acoustic wave filter further includes a first parallel arm that includes a parallel arm resonator and an inductivity connected in series between the series arm and a reference terminal, and at least a second parallel arm that includes a parallel arm resonator. The first parallel arm and the at least one second parallel arm are connected in parallel between a common one of the series arm sections and the reference terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.