Patent · US Expired

Surface acoustic wave filter having an improved edge steepness via series resonators with different finger periodicities

US6351197B1 · kind B1 · utility

17Cited by

9References

9Claims

0Family size

Assignee

EPCOS AG · DE

Inventors

Peter Selmeier · Haag in Oberbayern, DE
Maximilian Pitschi · Rottach-Egern, DE

Key dates

Filing date	Jan 18, 2000
Grant date	Feb 26, 2002
Priority date	—
Expiry date	Jan 18, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH03H9/6483
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A surface acoustic wave (SAW) filter having an improved edge steepness includes at least three resonators connected in series and/or parallel with one another. An edge steepness of a pass band is improved if a plurality of resonators with different finger periodicities of interdigital transducers are provided.

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