Band switching filter using a surface acoustic wave resonator and an antenna duplexer using the same
US6472953B1 · kind B1 · utility
39Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2000 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Mar 10, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/725
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A band switching filter includes a resonator circuit having a surface acoustic wave resonator, a switching element and an impedance element. The filter selectively passes or attenuates a signal through one of two pass bands using a single filter. The resonant frequency of the resonator circuit can be shifted to another frequency by selectively connecting the surface acoustic wave resonator to an impedance element using a switching element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.