Invention Grant
- Patent Title: Filter apparatus, multiplexer, radio-frequency front end circuit, and communication apparatus
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Application No.: US16532525Application Date: 2019-08-06
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Publication No.: US10886892B2Publication Date: 2021-01-05
- Inventor: Koji Nosaka
- Applicant: Murata Manufacturing Co., Ltd.
- Applicant Address: JP Nagaokakyo
- Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee Address: JP Nagaokakyo
- Agency: Keating & Bennett, LLP
- Priority: JP2017-029522 20170220
- Main IPC: H01Q1/50
- IPC: H01Q1/50 ; H03H9/02 ; H03H9/145 ; H03H9/25 ; H03H9/64 ; H03H9/72 ; H04B1/40
Abstract:
A filter includes a series arm resonant circuit connected between input/output terminals, and a parallel arm resonant circuit connected between a node on a path connecting the input/output terminals and ground. The series arm resonant circuit includes a series arm resonator having a band width ratio wider than the band width ratio of the parallel arm resonant circuit and a capacitor connected to the series arm resonator.
Information query
