Patent · US Expired

Filter with acoustically coupled resonators

US7304553B2 · kind B2 · utility

21Cited by

6References

40Claims

0Family size

Assignee

EPCOS AG · DE

Inventors

Thomas Bauer · Schrobenhausen, DE
Ken-ya Hashimoto · Funabashi, JP
Ulrike Roesler · Hebertshausen, DE
Werner Ruile · Birkenfeld, DE
Veit Meister · Erkner, DE
Heide Kuhrau · Birkenfeld, DE
Michael Jakob · Birkenfeld, DE

Key dates

Filing date	Mar 25, 2003
Grant date	Dec 4, 2007
Priority date	—
Expiry date	Sep 20, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH03H9/6453
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A component operating with surface-proximal acoustic waves, in particular a filter with novel structure, has interdigital transducers arranged in serial and parallel branches, which are acoustically coupled with one another in different configurations. The component provides a loss-poor filter with simultaneously space-saving arrangement of the filter elements.

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