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:
Feb. 03, 2026
Filed:
Apr. 22, 2024
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Toshiaki Takata, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A filter device includes at least one parallel arm resonator and series arm resonators including at least one first series arm resonator and at least one second series arm resonator being different from each other, a resonant frequency of the first series arm resonator is higher than a pass band of the filter device, the second series arm resonator has a series connection configuration in which at least two series arm resonators are connected in series to each other, anti-resonant frequencies of the at least two series arm resonators are different from each other, and the resonant frequency of the first series arm resonator is between the anti-resonant frequency of the series arm resonator on a lowest frequency side of the second series arm resonator and the anti-resonant frequency of the series arm resonator on a highest frequency side of the second series arm resonator.