Invention Grant
- Patent Title: Radio-frequency front-end circuit and communication device
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Application No.: US15646334Application Date: 2017-07-11
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Publication No.: US09998097B2Publication Date: 2018-06-12
- Inventor: Morio Takeuchi , Daisuke Miyazaki , Tetsuro Okuda
- Applicant: Murata Manufacturing Co., Ltd.
- Applicant Address: JP Kyoto
- Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee Address: JP Kyoto
- Agency: Keating & Bennett, LLP
- Priority: JP2016-140916 20160715; JP2017-086232 20170425
- Main IPC: H03H9/70
- IPC: H03H9/70 ; H04B1/40 ; H03H9/58 ; H03H9/205 ; H03H9/02

Abstract:
A radio-frequency front-end circuit includes a first filter that has a first pass band and is connected to an antenna common terminal, a second filter that has a second pass band and is connected to the antenna common terminal, a switch that includes a common terminal and selection terminals, the common terminal being connected to the first filter, and a third filter that is connected to one of the selection terminals and is disposed between the switch and an input/output terminal. A reflection coefficient of the first filter alone in the second pass band viewed from the antenna common terminal is larger than a reflection coefficient of the third filter alone in the second pass band viewed from the antenna common terminal.
Public/Granted literature
- US20180019730A1 RADIO-FREQUENCY FRONT-END CIRCUIT AND COMMUNICATION DEVICE Public/Granted day:2018-01-18
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