Surface acoustic wave duplexer having enhanced isolation performance
US7196594B2 · kind B2 · utility
7Cited by
31References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2005 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Jul 15, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/725
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A miniaturized SAW duplexer includes SAW filters carried on a monolithic piezoelectric chip that is mounted inside a multi-layered ceramic package. A phase matching stripline is embedded diagonally and between two ground layers of the multi-layered ceramic package and is positioned between a wall of vias for significantly minimizing coupling between transmitted and received filters by providing an improved ground shielding of the phase matching stripline. Coupling within the same filter and coupling between the SAW filters are suppressed and thus provide enhanced isolation performance. for the SAW duplexer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.