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:
Oct. 21, 2025
Filed:
Jan. 05, 2024
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A filter device includes a stacked body, an input terminal, an output terminal, a ground terminal, a ground electrode, first and second resonators, and a coupling electrode. The input, output and ground terminals are located on a lower surface of the stacked body. The first and second resonators are in a signal transmission path between the input and output terminals. The coupling electrode capacitively couples the first and second resonators. The first and second resonators respectively include first and second capacitor electrodes defining capacitors with the ground electrode. The coupling electrode is connected to the first capacitor electrode and defines a capacitor with the second capacitor electrode. The coupling electrode includes first and second electrodes. First ends of the first and second electrodes are connected to each other. Second ends of the first and second electrodes are connected to the first capacitor electrode.