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:
Dec. 01, 2015
Filed:
Oct. 17, 2011
Applicants:
Thomas Bauer, München, DE;
Matthias Jungkunz, München, DE;
Inventors:
Thomas Bauer, München, DE;
Matthias Jungkunz, München, DE;
Assignee:
EPCOS AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/46 (2006.01); H03H 9/54 (2006.01); H03H 9/05 (2006.01); H03H 9/56 (2006.01); H03H 9/64 (2006.01);
U.S. Cl.
CPC ...
H03H 9/54 (2013.01); H03H 9/0542 (2013.01); H03H 9/568 (2013.01); H03H 9/6483 (2013.01);
Abstract
The invention relates to a band rejection filter comprising a piezoelectric substrate and a serial connection of at least two pi-elements which are arranged on the substrate. The pi-elements respectively comprise at least two electro-acoustic parallel resonators and at least one electro-acoustic serial resonator, and are connected by a first series inductance. Said serial connection comprises, on a first inlet, a second series inductance and on an outlet, a third series inductance. Said resonators have a pole-zero plot of approximately 9% or more.