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公开(公告)号：US20210273670A1
公开(公告)日：2021-09-02
申请号：US17322986
申请日：2021-05-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Junpei YASUDA
Abstract: A front-end circuit includes an antenna connection terminal, a selection terminal, and a selection terminal, a switching circuit including a common terminal and selection terminals, a receive filter configured to pass a radio-frequency signal in Band B, a signal path connecting the selection terminal and the selection terminal and including the receive filter, a signal path connecting the selection terminal and the selection terminal and defining and functioning as a bypass path without any filter, and a filter coupled between the antenna connection terminal and the common terminal and configured to pass a first frequency range group including Band B.
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公开(公告)号：US20200228097A1
公开(公告)日：2020-07-16
申请号：US16830318
申请日：2020-03-26
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Junpei YASUDA
Abstract: A multiplexer includes a plurality of filters, in which one input/output terminal of each of the plurality of filters is connected to a common terminal, a first filter included in the plurality of filters is a ladder filter and includes at least one series arm resonator connected on a path connecting the common terminal and another input/output terminal of the first filter, at least one parallel arm resonator connected between a connection node provided on the path and a ground, and a switch which is connected in series to a parallel arm resonator connected most nearby to the common terminal among at least one parallel arm resonator and switches between conduction and non-conduction of a node to which the parallel arm resonator is connected and the ground.
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公开(公告)号：US20190356302A1
公开(公告)日：2019-11-21
申请号：US16527082
申请日：2019-07-31
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Junpei YASUDA
Abstract: An acoustic wave device includes an antenna terminal, a signal terminal, and a plurality of resonators that are provided on a piezoelectric substrate. The plurality of resonators include a plurality of series arm resonators on a series arm, and the duty of an IDT electrode of the series arm resonator closest to the antenna terminal among the plurality of series arm resonators is smaller than the duty of an IDT electrode of at least one series arm resonator among the other series arm resonators.
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公开(公告)号：US20150054597A1
公开(公告)日：2015-02-26
申请号：US14445307
申请日：2014-07-29
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Junpei YASUDA
CPC classification number: H03H9/725 , H03H9/542 , H03H9/562 , H03H9/6423
Abstract: An elastic wave filter device includes a one-port elastic wave resonator and an elastic wave filter unit connected in series to the one-port elastic wave resonator. The one-port elastic wave resonator is connected in parallel to an inductance. In the elastic wave filter device, fr1>f0 is satisfied, where f0 is the center frequency of a passband of the elastic wave filter unit, and fr1 is a resonant frequency of the one-port elastic wave resonator.
Abstract translation: 弹性波滤波器装置包括与单端口弹性波谐振器串联连接的单端口弹性波谐振器和弹性波滤波器单元。 单端口弹性波谐振器与电感并联连接。 在弹性波滤波器装置中，满足fr1> f0，其中f0是弹性波滤波器单元的通带的中心频率，fr1是单端口弹性波谐振器的谐振频率。
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5.发明申请公开(公告)号：US20130069742A1
公开(公告)日：2013-03-21
申请号：US13677818
申请日：2012-11-15
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Junpei YASUDA
IPC: H03H9/64
CPC classification number: H03H9/64 , H03H9/0542 , H03H9/0576 , H03H2250/00
Abstract: A dual-band surface acoustic wave filter is mounted on a circuit board together with a high-frequency switch, constitutes a composite high-frequency component together with the high-frequency switch, and significantly reduces and prevents deterioration of filter characteristics of the composite high-frequency component. A first input terminal is located on a first corner portion of a second principal surface of a wiring board. A second input terminal is located on the second principal surface of the wiring board and along a first long side or a first short side so as to be next to the first input terminal. First and second output terminals are arranged on an edge portion of the second principal surface of the wiring board on a second long side and along the second long side.
Abstract translation: 双频表面声波滤波器与高频开关一起安装在电路板上，与高频开关一起构成复合高频分量，显着降低并防止复合高频滤波器特性的恶化 频率分量。 第一输入端子位于布线板的第二主表面的第一角部上。 第二输入端子位于布线板的第二主表面上，并且沿着第一长边或第一短边位于第一输入端子的旁边。 第一和第二输出端子布置在布线板的第二主表面的沿着第二长边侧的边缘部分上。
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Patent Agency Ranking
公开(公告)号：US20200304100A1
公开(公告)日：2020-09-24
申请号：US16898593
申请日：2020-06-11
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Junpei YASUDA
Abstract: A filter module includes a filter provided on a path connecting an input/output terminal and an input/output terminal, a filter provided on a path connecting an input/output terminal and an input/output terminal, a switch that switches between electrical connection and electrical disconnection between a wire connected to the input/output terminal and a ground, and a switch that switches between electrical connection and electrical disconnection between a wire connected to the input/output terminal and the ground. When the wire and the ground are electrically connected by the switch, the wire and the ground are electrically disconnected by the switch, and when the wire and the ground are electrically connected by the switch, the wire and the ground are electrically disconnected by the switch.
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公开(公告)号：US20190190487A1
公开(公告)日：2019-06-20
申请号：US16282846
申请日：2019-02-22
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Junpei YASUDA
CPC classification number: H03H9/14538 , H03H3/08 , H03H9/64 , H03H9/6436 , H03H9/6483 , H03H9/725
Abstract: An elastic wave device includes a first band-pass filter on a piezoelectric substrate and including first IDT electrodes and a first dielectric film, and a second band-pass filter on the piezoelectric substrate and including second IDT electrodes and a second dielectric film. At least one pair among a pair of the first and second IDT electrodes and a pair of the first and second dielectric films has the same or substantially the same film thickness and is made of the same material. A relationship |Tx1−Rx1|/f1>|Tx2−Rx2|/f2 is satisfied. A weighted average of duty ratios of the first IDT electrodes is larger than a weighted average of duty ratios of the second IDT electrodes.
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公开(公告)号：US20190027676A1
公开(公告)日：2019-01-24
申请号：US16034385
申请日：2018-07-13
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Junpei YASUDA
IPC: H01L41/053 , H01L23/00 , H01L25/16 , H01L23/31 , H01L23/29 , H01L23/14 , H01L23/15 , H01L41/047 , H01L23/552 , H01L41/25 , H01L21/56
Abstract: An electronic module includes a substrate that includes a first main surface and a second main surface, at least one first electronic component that includes electrodes on a mounting surface thereof on the substrate and that includes a hollow portion, at least one second electronic component that includes electrodes on a mounting surface thereof on the substrate and that includes no hollow portion, and a sealing resin. The at least one first electronic component is mounted on the first main surface of the substrate and sealed with the sealing resin. The at least one second electronic component is mounted on the second main surface of the substrate and is not sealed with the sealing resin.
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公开(公告)号：US20180227006A1
公开(公告)日：2018-08-09
申请号：US15944817
申请日：2018-04-04
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Junpei YASUDA
Abstract: A switch module includes a filter that allows a signal in a first frequency range to pass therethrough, a filter that allows a signal in a second frequency range to pass therethrough, an impedance load circuit, and an antenna switch including a common terminal connected to an antenna element, a first selection terminal connected to the filter, a second selection terminal connected to the filter, and a third selection terminal connected to the impedance load circuit. When only one frequency range is selected from among the first and second frequency ranges, the antenna switch connects the common terminal to only one of the first and second selection terminals and connects the common terminal to the third selection terminal.
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公开(公告)号：US20170359048A1
公开(公告)日：2017-12-14
申请号：US15599506
申请日：2017-05-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Junpei YASUDA
CPC classification number: H03H9/02637 , H03H9/02992 , H03H9/145 , H03H9/25 , H03H9/6436 , H03H9/6483 , H03H9/725
Abstract: A multiplexer includes a first filter disposed between an antenna common terminal and a first terminal, and a second filter that is disposed between the antenna common terminal and a second terminal and that has higher passband frequencies than the first filter. The second filter includes IDTs that are longitudinally coupled. Among IDT electrodes in the IDTs, first IDT electrodes are connected to the antenna common terminal side, and second IDT electrodes are connected to the second terminal side. The first and second IDT electrodes have different main pitches of the electrode fingers. At least one of the second IDT electrodes out of all of the electrode fingers has a maximum main pitch.
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