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:
Mar. 26, 2019
Filed:
Jul. 11, 2018
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto-fu, JP;
Masanori Kato, Nagaokakyo, JP;
Syunsuke Kido, Nagaokakyo, JP;
Minoru Iwanaga, Nagaokakyo, JP;
Hiroshi Matsubara, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A high-frequency filter coupled between an input-output terminal and another input-output terminal includes series arm resonators, parallel arm resonators, and an inductor defining an LC resonant circuit. Frequencies at a first attenuation pole defined by resonant frequencies or anti-resonant frequencies of the series arm resonators and the parallel arm resonators and a frequency at a second attenuation pole defined by a resonant frequency of the LC resonant circuit are included in one stop band of the high-frequency filter, and the frequencies at the first attenuation pole are located closer than the frequency at the second attenuation pole to a pass band of the high-frequency filter.