Patent · US Active

Transducer operating with surface acoustic waves and having four excitation centers

US7863800B2 · kind B2 · utility

1Cited by

13References

15Claims

0Family size

Assignee

EPCOS AG · DE

Inventors

Andreas Bergmann · Berlin, DE
Thomas Ebner · Braunau am Inn, AT

Key dates

Filing date	Sep 19, 2006
Grant date	Jan 4, 2011
Priority date	—
Expiry date	May 7, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH03H9/02858
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A transducer operating with surface acoustic waves is specified, which is divided into cells, whose length essentially equals one wavelength, comprising cells of the second type, which are SPUDT cells and which have an excitation intensity of 100%, and at least one cell of the first cell type, which has at least four excitation centers, wherein an excitation center lies between two adjacent fingers with different polarities, and wherein the cell of the first cell type has an excitation intensity of a maximum of 30%.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.