The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2006
Filed:
Mar. 01, 2002
Applicants:
Thomas Bauer, München, DE;
Martin Bünner, München, DE;
Andreas Detlefsen, Gerwering, DE;
Dietmar Ritter, Stamberg, DE;
Inventors:
Thomas Bauer, München, DE;
Martin Bünner, München, DE;
Andreas Detlefsen, Gerwering, DE;
Dietmar Ritter, Stamberg, DE;
Assignee:
Epcos AG, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 41/08 (2006.01); H03H 9/145 (2006.01); H03H 9/25 (2006.01);
U.S. Cl.
CPC ...
Abstract
For improved conformance of a filter operating with acoustic waves, a transducer structure is provided in which the separations between respectively two adjacent electrode fingers of an inter-digital transducer (IDT) vary over the length of the transducer. The variation thereby preferably follows a continuous distribution function. Reactance filters that are provided with such filters in the serial branch show an improved electrical conformance in the transmission range.