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. 05, 2021
Filed:
Jan. 10, 2019
Murata Manufacturing Co., Ltd., Kyoto, JP;
Masakazu Tani, Kyoto, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
Even when frequency characteristics are changed in association with multiple communication bands, an attenuation required for a specific frequency band outside a pass band is obtained. A frequency-variable filter () includes multiple series-arm resonators (), multiple parallel-arm resonators (), a variable capacitor (), and an inductor () having a fixed inductance. The multiple series-arm resonators () and the multiple parallel-arm resonators () are connected in a ladder shape. The variable capacitor () is connected in series with the parallel-arm resonator (). The fixed inductor () is connected in series with the parallel-arm resonator ().