Surface acoustic wave passband control
US7656253B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2007 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Dec 26, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/42
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus in one example comprises a piezoelectric layer, an input transducer, an output transducer, and at least one electrode set. The input transducer is configured to convert an input signal from an input source to a surface acoustic wave and send the surface acoustic wave from an input portion of the piezoelectric layer to an output portion of the piezoelectric layer. The input transducer comprises a set of input passbands. The output transducer is configured to receive the surface acoustic wave from the output portion of the piezoelectric layer. The output transducer comprises a set of output passbands. The at least one electrode set is configured to apply at least one voltage bias to at least one portion of the piezoelectric layer to create an electric field that controls an acoustic velocity of the surface acoustic wave through the at least one portion of the piezoelectric layer. The at least one electrode set is configured to control one or more of the set of input passbands and the set of output passbands by adjustment of the at least one voltage bias.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.