Waveguide components on the basis of acoustic surface waves, and their use
US8004147B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2007 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Mar 27, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14564
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to waveguide components based on acoustic surface waves, comprising at least one interdigital converter for exciting acoustic surface waves in a piezoelectric substrate or a piezoelectric layer. The object of the invention is to change known waveguide components, comprising at least one interdigital converter for exciting acoustic surface waves in a piezoelectric substrate or a piezoelectric layer, such that no reflectors are necessary with an otherwise equivalent function. The inventive waveguide components are characterized in that the interdigital converter(s) a) is or are disposed at a defined distance over the piezoelectric substrate or the piezoelectric layer for exciting wave fields, or b) is or are in contact with the piezoelectric substrate or the piezoelectric layer, wherein in version a) the piezoelectric substrate is designed as a ring and the piezoelectric layer is designed as a circular region. In case of version b), the interdigital converter and/or the piezoelectric layer form circular regions. The components can be used for example as resonators, filters, oscillators and sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.