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:
Jan. 04, 2011
Filed:
Sep. 19, 2006
Applicants:
Andreas Bergmann, Haiming, DE;
Thomas Ebner, Munich, DE;
Inventors:
Andreas Bergmann, Haiming, DE;
Thomas Ebner, Munich, DE;
Assignee:
Epcos AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 41/04 (2006.01); H03H 9/145 (2006.01);
U.S. Cl.
CPC ...
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%.