Surface acoustic wave resonator filter with longitudinally coupled transducers
US7728698B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 2005 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Jul 7, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14588
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave filter includes an acoustic track bounded by reflectors, at least a first input transducer and at least a second input transducer acoustically coupled to the acoustic track that are connected in parallel and connected to an asymmetric input port, at least two first output transducers acoustically coupled to the acoustic track that are connected in parallel and connected, to a first terminal of a symmetric output port and at least two second output transducers acoustically coupled to the acoustic track that are connected in parallel and connected to a second terminal of a symmetric output port. Each first output transducer in the acoustic track and corresponding second output transducers are side-by-side and are electrically connected in series via a first bus bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.