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公开(公告)号：US20180019730A1
公开(公告)日：2018-01-18
申请号：US15646334
申请日：2017-07-11
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Morio TAKEUCHI , Daisuke MIYAZAKI , Tetsuro OKUDA
CPC classification number: H03H9/70 , H03H9/0211 , H03H9/02559 , H03H9/02574 , H03H9/14541 , H03H9/205 , H03H9/582 , H03H9/703 , H03H9/72 , H04B1/40
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.
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公开(公告)号：US20150137909A1
公开(公告)日：2015-05-21
申请号：US14606110
申请日：2015-01-27
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tetsuro OKUDA , Koichiro KAWASAKI
IPC: H03H9/70
CPC classification number: H03H9/725 , H03H7/01 , H03H7/46 , H03H9/0009 , H03H9/0057 , H03H9/0571 , H03H9/0576 , H03H9/46 , H03H9/6483 , H03H9/706
Abstract: A filter device includes a first signal terminal, a second signal terminal, a filter unit, a first inductor and a second inductor. The filter unit is connected between the first signal terminal and the second signal terminal. The first inductor is connected between a connection point between the filter unit and the first signal terminal, and a ground potential. The second inductor is connected between the filter unit and the second signal terminal. The second inductor is electromagnetically coupled with the first inductor.
Abstract translation: 滤波器装置包括第一信号端子，第二信号端子，滤波器单元，第一电感器和第二电感器。 滤波器单元连接在第一信号端和第二信号端之间。 第一电感器连接在滤波器单元和第一信号端子之间的连接点和接地电位之间。 第二电感器连接在滤波器单元和第二信号端子之间。 第二电感器与第一电感器电磁耦合。
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公开(公告)号：US20180019832A1
公开(公告)日：2018-01-18
申请号：US15636676
申请日：2017-06-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tetsuro OKUDA
CPC classification number: H04J3/247 , G06F13/22 , H03H9/02574 , H03H9/145 , H03H9/25 , H03H9/605 , H03H9/6436 , H03H9/6483 , H03H9/706 , H03H9/72 , H03H9/725 , H04B1/005 , H04B1/406 , H04B1/48 , H04J3/1682
Abstract: A multiplexer includes filters connected to each other at a common terminal, a low-frequency filter with a first pass band, and a high-frequency filter with a second pass band that is higher than the first pass band. The low-frequency filter includes an initial-stage filter section including at least one first elastic wave resonator located on the common terminal side among at least two elastic wave resonators, and a subsequent-stage filter section that includes a second elastic wave resonator other than the at least one first elastic wave resonator. A reflection coefficient in the second pass band when the initial-stage filter section is viewed from the common terminal side as a single component is larger than a reflection coefficient in the second pass band when the subsequent-stage filter section is viewed from the common terminal side as a single component.
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公开(公告)号：US20150180447A1
公开(公告)日：2015-06-25
申请号：US14637742
申请日：2015-03-04
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tetsuro OKUDA
CPC classification number: H03H9/205 , H03H7/463 , H03H9/0085 , H03H9/0557 , H03H9/25 , H03H9/542 , H03H9/6483 , H03H9/725
Abstract: A filter device with a ladder circuit configuration includes series arm resonators and parallel arm resonators, a filter component mounted on a mounting substrate and including a chip substrate and an elastic wave filter chip, a circuit configuration in which a plurality of series arm resonators and parallel arm resonators are defined by the elastic wave filter chip, and inductances are connected between ground-potential-side end portions of the plurality of parallel arm resonators and a ground potential, and in which at least one of the plurality of inductances is provided in the chip substrate and a remaining at least one inductance is provided in the mounting substrate.
Abstract translation: 具有梯形电路结构的滤波器装置包括串联臂谐振器和并联臂谐振器，安装在安装基板上并包括芯片基板和弹性波滤波器芯片的滤波器部件，其中多个串联臂谐振器和并联 臂谐振器由弹性波滤波器芯片限定，并且电感连接在多个并联臂谐振器的接地电位侧端部和接地电位之间，并且其中多个电感中的至少一个设置在 并且在安装基板中设置剩余的至少一个电感。
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公开(公告)号：US20210297097A1
公开(公告)日：2021-09-23
申请号：US17341477
申请日：2021-06-08
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tetsuro OKUDA
Abstract: A multiplexer includes a first filter on a first path, a second filter on a second path, and a third filter on a third path. A frequency of intermodulation distortion generated by a transmission signal within a pass band of the first filter and a transmission signal within a pass band of the second filter is within a pass band of the third filter. The first filter includes one or more series resonators on the first path and one or more parallel resonators on one or more paths connecting one or more nodes on the first path to a ground. A relative permittivity of a resonator of the one or more series resonators and the one or more parallel resonators that is closest to a common terminal is lowest among relative permittivities of the resonators.
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Patent Agency Ranking
公开(公告)号：US20200083866A1
公开(公告)日：2020-03-12
申请号：US16536625
申请日：2019-08-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Hidetaro NAKAZAWA , Tetsuro OKUDA
Abstract: A filter includes a signal path connecting an input terminal and an output terminal one or more series arm circuits on the signal path, and one or more parallel arm circuits connected to one or more nodes disposed on the signal path and a ground electrode. The one or more series arm circuits define any of a section between nodes adjacent to each other, a section between a node closest to the input terminal and the input terminal, and a section between a node closest to the output terminal and the output terminal. Among the one or more series arm circuits and the one or more parallel arm circuits, one circuit does not include any acoustic wave resonator, and another circuit includes an acoustic wave resonator.
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公开(公告)号：US20130021116A1
公开(公告)日：2013-01-24
申请号：US13630069
申请日：2012-09-28
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Shinichi SOGOYA , Tetsuro OKUDA , Takuma KUZUSHITA
IPC: H03H9/64
CPC classification number: H03H9/6483 , H03H9/0222 , H03H9/14573 , H03H9/725
Abstract: An elastic wave device includes a piezoelectric substrate, an IDT electrode located on the piezoelectric substrate, and a capacitive electrode that is located on the piezoelectric substrate and is connected in series with the IDT electrode. The capacitive electrode includes a plurality of capacitive electrode portions, each of which includes a pair of mutually interdigitated comb-shaped electrodes. The plurality of capacitive electrode portions are connected with each other in parallel. The plurality of capacitive electrode portions are arranged such that an intersecting width direction D1 of the capacitive electrode portions is inclined with respect to an intersecting width direction D2 of the IDT electrode. The plurality of capacitive electrode portions are arrayed in an elastic-wave propagating direction D3 of the IDT electrode.
Abstract translation: 弹性波装置包括压电基板，位于压电基板上的IDT电极和位于压电基板上并与IDT电极串联连接的电容电极。 电容电极包括多个电容电极部，每个电容电极包括一对相互交错的梳状电极。 多个电容电极部彼此并联连接。 多个电容电极部分布置成使得电容电极部分的相交宽度方向D1相对于IDT电极的相交宽度方向D2倾斜。 多个电容电极部分以IDT电极的弹性波传播方向D3排列。
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公开(公告)号：US20220123733A1
公开(公告)日：2022-04-21
申请号：US17562059
申请日：2021-12-27
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tetsuro OKUDA
Abstract: An acoustic wave filter includes input and output terminals, and series arm and parallel arm circuits. The series arm circuit includes first and second series arm resonators connected in series between the input and output terminals. The parallel arm circuit includes a parallel arm resonator connected between the series arm circuit and a ground potential. Each of the first and second series arm resonators is a SAW resonator including a piezoelectric substrate and an IDT electrode on the piezoelectric substrate, and has a characteristic that a fractional band width increases with a decrease in a thickness of the piezoelectric substrate. An anti-resonant frequency of the first series arm resonator is lower than an anti-resonant frequency of the second series arm resonator. A wavelength of a signal passing through the first series arm resonator is shorter than a wavelength of a signal passing through the second series arm resonator.
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公开(公告)号：US20160301385A1
公开(公告)日：2016-10-13
申请号：US15190294
申请日：2016-06-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tetsuro OKUDA
CPC classification number: H03H9/725 , H01P1/184 , H01P1/201 , H01P1/213 , H01P1/2135 , H03H9/0009 , H03H9/0014 , H03H9/0028 , H03H9/0085 , H03H9/0557 , H03H9/0576 , H03H9/64 , H03H9/706
Abstract: In a filter device, a first filter and a second filter are connected to a common connection point by a filter connection conductor line including a first conductor line portion, and a parallel connection area with an electrical length shorter than that in a single conductor line is provided in the first conductor line portion.
Abstract translation: 在滤波器装置中，第一滤波器和第二滤波器通过包括第一导体线部分的滤波器连接导体线连接到公共连接点，并且电长度短于单个导线中的并联连接区域是 设置在第一导体线部分中。
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公开(公告)号：US20130314178A1
公开(公告)日：2013-11-28
申请号：US13959962
申请日：2013-08-06
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Koichiro KAWASAKI , Tetsuro OKUDA
IPC: H03H9/64
CPC classification number: H03H9/6483 , H03H7/075 , H03H9/0222 , H03H9/1452 , H03H9/14573 , H03H9/6496
Abstract: A ladder filter device includes elastic wave resonators with IDT electrodes. An apodization angle θ in an IDT electrode of a series arm resonator in the ladder filter device falls within a range from about 2° to about 14° with respect to an elastic wave propagation direction. This arrangement provides a ladder filter device that has a smaller insertion loss in a low frequency side portion of a passing band.
Abstract translation: 梯形滤波器装置包括具有IDT电极的弹性波谐振器。 梯形滤波器装置中的串联臂谐振器的IDT电极中的变迹角θ相对于弹性波传播方向落入约2°至约14°的范围内。 这种布置提供了在通带的低频侧部分具有较小的插入损耗的梯形滤波器装置。
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