EP 1368894 A1 20031210 - TRANSDUCER STRUCTURE THAT OPERATES WITH ACOUSTIC WAVES
Title (en)
TRANSDUCER STRUCTURE THAT OPERATES WITH ACOUSTIC WAVES
Title (de)
MIT AKUSTISCHEN WELLEN ARBEITENDE WANDLERSTRUKTUR
Title (fr)
STRUCTURE DE TRANSDUCTEUR FONCTIONNANT AVEC DES ONDES ACOUSTIQUES
Publication
Application
Priority
- DE 0200755 W 20020301
- DE 10111959 A 20010313
Abstract (en)
[origin: WO02073800A1] The aim of the invention is to achieve an improved adaptation of a filter that operates with acoustic waves. To this end, the invention provides a transducer structure in which the distances between each two adjacent electrode fingers of an interdigital transducer (IDTV) vary over the length of the transducer. The variation preferably follows a continuous distribution function. Reactance filters that are equipped in the serial branch with such resonators exhibit an improved electrical adaptation in the passband.
IPC 1-7
IPC 8 full level
H01L 41/09 (2006.01); H03H 9/145 (2006.01); H03H 9/64 (2006.01)
CPC (source: EP US)
H03H 9/14555 (2013.01 - EP US)
Citation (search report)
See references of WO 02073800A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 02073800 A1 20020919; DE 10111959 A1 20020919; DE 10111959 B4 20141120; EP 1368894 A1 20031210; JP 2004523179 A 20040729; JP 4017984 B2 20071205; US 2004090145 A1 20040513; US 7042132 B2 20060509
DOCDB simple family (application)
DE 0200755 W 20020301; DE 10111959 A 20010313; EP 02721986 A 20020301; JP 2002572725 A 20020301; US 47198703 A 20030912