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. 30, 2007
Filed:
May. 12, 2004
Kenji Inoue, Tokyo, JP;
Hisatoshi Saitou, Tokyo, JP;
Kenji Inoue, Tokyo, JP;
Hisatoshi Saitou, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
In a filter deviceconstituted by circuit elements formed on a single substrate, the circuit elements includes a first wing sectionformed between an input signal electrodeand an output signal electrode, first resonatorslocated in the first wiring sectionand having a predetermined resonance frequency, second wiring sectionsformed between the first wiring sectionand a ground electrode, second resonatorslocated in the second wiring sectionsand having an anti-resonance frequency forming a pass-band with the predetermined resonance frequency of the first resonators. An effective electric and mechanical coupling factor of the second resonatoris different from those of the other resonators