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    HIGH-FREQUENCY FILTER
    12.
    发明申请
    HIGH-FREQUENCY FILTER 审中-公开
    高频滤波器

    公开(公告)号：US20160301383A1

    公开(公告)日：2016-10-13

    申请号：US15188491

    申请日：2016-06-21

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Masakazu TANI

    IPC: H03H9/54

    CPC classification number: H03H7/0153 ,  H03H9/542 ,  H03H9/568 ,  H03H9/605 ,  H03H9/6403 ,  H03H9/6483 ,  H03H2210/025

    Abstract: A high-frequency filter (10) includes a first input-output terminal (P1), a second input-output terminal (P2), a variable frequency filter (20), and a fixed frequency filter (30). The variable frequency filter (20) and the fixed frequency filter (30) are connected in series and coupled between the first input-output terminal (P1) and the second input-output terminal (P2). The variable frequency filter (20) is a filter capable of varying a passband and an attenuation band. The fixed frequency filter (30) is a filter having a fixed passband and a fixed attenuation band. The passband of the fixed frequency filter (30) is set so as to be at least partially overlapped with multiple passbands realized by the fixed frequency filter (30).

    Abstract translation: 高频滤波器（10）包括第一输入输出端子（P1），第二输入输出端子（P2），可变频率滤波器（20）和固定频率滤波器（30）。 可变频率滤波器（20）和固定频率滤波器（30）串联连接在第一输入输出端子（P1）和第二输入输出端子（P2）之间。 可变频率滤波器（20）是能够改变通带和衰减频带的滤波器。 固定频率滤波器（30）是具有固定通带和固定衰减频带的滤波器。 固定频率滤波器（30）的通带被设置为至少部分地与由固定频率滤波器（30）实现的多个通带重叠。

    RESONATOR DEVICE AND HIGH FREQUENCY FILTER
    13.
    发明申请
    RESONATOR DEVICE AND HIGH FREQUENCY FILTER 有权
    谐振器和高频滤波器

    公开(公告)号：US20160204755A1

    公开(公告)日：2016-07-14

    申请号：US15076965

    申请日：2016-03-22

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Hajime KANDO ,  Masakazu TANI

    IPC: H03H7/01 ,  H03H9/64 ,  H03H9/54

    CPC classification number: H03H9/542 ,  H03H5/12 ,  H03H7/0115 ,  H03H7/0161 ,  H03H9/54 ,  H03H9/545 ,  H03H9/568 ,  H03H9/64 ,  H03H9/6403 ,  H03H9/6423 ,  H03H9/6483 ,  H03H2009/02204 ,  H03H2210/025

    Abstract: A resonant circuit includes a resonator having a resonant frequency and an anti-resonant frequency, an inductor connected in series to the resonator, an inductor connected in parallel to the resonator, and a series circuit in which a variable capacitor is connected in series to an inductor (15). The series circuit is connected in parallel to the resonator. The anti-resonant frequency closest to the resonant frequency of the resonator is moved toward higher frequencies or lower frequencies of the resonant frequency on a frequency axis with a variation in the capacitance value of the variable capacitor. With this configuration, a resonator device and a high-frequency filter are provided, in which the relationship between a transmission frequency band and a reception frequency band on the frequency axis is applicable to a variety of multiple communication bands.

    Abstract translation: 谐振电路包括具有谐振频率和反谐振频率的谐振器，串联连接到谐振器的电感器，与谐振器并联的电感器，以及串联电路，其中可变电容器串联连接到谐振器 电感（15）。 串联电路与谐振器并联连接。 谐振器的谐振频率最接近的反谐振频率随着可变电容器的电容值的变化而向频率轴上的谐振频率的较高频率或较低频率移动。 利用这种配置，提供了一种谐振器装置和高频滤波器，其中发送频带和频率轴上的接收频带之间的关系可应用于各种多个通信频带。

    MULTIPLEXER, RADIO FREQUENCY CIRCUIT, AND COMMUNICATION DEVICE
    14.
    发明申请
    MULTIPLEXER, RADIO FREQUENCY CIRCUIT, AND COMMUNICATION DEVICE 有权

    公开(公告)号：US20230073105A1

    公开(公告)日：2023-03-09

    申请号：US18055869

    申请日：2022-11-16

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Masakazu TANI

    IPC: H04L27/20 ,  H04L27/233

    Abstract: Filter characteristics of a first filter are improved while suppressing degradation in filter characteristics of a second filter. A multiplexer includes a first terminal, a second terminal, a first filter, a second filter, and a capacitive element. The first filter and the second filter are connected to an antenna via the first terminal. The first filter includes a plurality of series arm resonators, a plurality of parallel arm resonators, and an inductor. The inductor is provided between the parallel arm resonator and ground. A first end portion of the capacitive element is connected to a first path at a position in between the series arm resonator that is the closest to the first terminal and the second terminal. A second end portion of the capacitive element is connected between the parallel arm resonator and the inductor.

    MULTIPLEXER, FRONT END MODULE, AND COMMUNICATION DEVICE
    15.
    发明申请
    MULTIPLEXER, FRONT END MODULE, AND COMMUNICATION DEVICE 有权

    公开(公告)号：US20210409042A1

    公开(公告)日：2021-12-30

    申请号：US17471806

    申请日：2021-09-10

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Masakazu TANI

    IPC: H04B1/00 ,  H03H9/64 ,  H03H9/72 ,  H04B1/18

    Abstract: A multiplexer includes a common terminal, reception output terminals (120 and 130), a filter (20) that is connected between the common terminal and the reception output terminal (120), a filter (30) that is connected between the common terminal and the reception output terminal (130) and has a pass band different from a pass band of the filter (20), and an impedance matching circuit that is arranged between the common terminal and the filter (30). The impedance matching circuit includes a parallel-arm resonator that is connected between a node (N1) on a path connecting the common terminal to the filter (30) and a ground.

    MULTIPLEXER, RADIO FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION DEVICE
    16.
    发明申请
    MULTIPLEXER, RADIO FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION DEVICE 审中-公开

    公开(公告)号：US20200382146A1

    公开(公告)日：2020-12-03

    申请号：US16996064

    申请日：2020-08-18

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Yusuke NANIWA ,  Morio TAKEUCHI ,  Masakazu TANI

    IPC: H04B1/00 ,  H04B1/74

    Abstract: A multiplexer includes first, second, and third filters with first, second, and third frequency bands different from each other, a first connection point connected to a common terminal, a second connection point connected to one end of the first filter and one end of the second filter, a first switch that switches connection and disconnection between the first and second connection points, a reactance element whose one end is connected to a signal path connecting the second connection point and the first switch, a second switch that switches connection and disconnection between the other end of the reactance element and the first connection point, and a third switch that switches connection and disconnection between one end of the third filter and the first connection point. The first and second frequency bands are adjacent to each other among the first, second, and third frequency bands.

    MULTIPLEXER, HIGH-FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION DEVICE
    17.
    发明申请
    MULTIPLEXER, HIGH-FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION DEVICE 审中-公开

    公开(公告)号：US20200382102A1

    公开(公告)日：2020-12-03

    申请号：US16998286

    申请日：2020-08-20

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Yusuke NANIWA ,  Masakazu TANI

    IPC: H03H9/72 ,  H03H9/64 ,  H03H9/25 ,  H03H9/145 ,  H03H9/02 ,  H04B1/40

    Abstract: A multiplexer includes a common terminal, a first acoustic wave filter having a first frequency band as a pass band, and having a first input/output terminal connected to the common terminal, a second acoustic wave filter having a second frequency band higher than the first frequency band as a pass band, and having a second input/output terminal connected to the common terminal, an inductance element, and a first capacitance element. The first acoustic wave filter has a parallel resonator of which one end is connected to the first input/output terminal and another end is connected to a ground electrode, and the first input/output terminal is connected to the common terminal via the inductance element, and the first capacitance element is connected between a signal path between the one end of the parallel resonator and the inductance element, and a ground electrode.

    FREQUENCY-VARIABLE FILTER
    19.
    发明申请
    FREQUENCY-VARIABLE FILTER 审中-公开
    频率可变滤波器

    公开(公告)号：US20160211824A1

    公开(公告)日：2016-07-21

    申请号：US15078372

    申请日：2016-03-23

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Hajime KANDO ,  Masakazu TANI

    IPC: H03H7/38 ,  H03H9/64 ,  H03H9/54

    CPC classification number: H03H9/542 ,  H03H7/38 ,  H03H9/0004 ,  H03H9/605 ,  H03H9/64 ,  H03H9/6483 ,  H03H2210/012 ,  H03H2210/025

    Abstract: A frequency-variable filter includes a filter unit and matching circuits. The filter unit includes frequency-variable resonance circuits that include piezoelectric resonators. The matching circuits have a circuit configuration in which a real number component of an impedance increases as the frequency increases. For example, the matching circuits have an L-type circuit configuration that includes a reactance element connected in shunt to the side of the filter unit and that includes an inductor and a capacitor. As the filter unit includes the piezoelectric resonators, the real number component of the impedance increases as the pass band shifts to a high-frequency side, but the real number component of the impedance increases as the frequency increases in the matching circuits as well. Thus, the impedance matching is achieved

    Abstract translation: 频率可变滤波器包括滤波器单元和匹配电路。 滤波器单元包括包括压电谐振器的频率可变谐振电路。 匹配电路具有其中阻抗的实数分量随频率增加而增加的电路配置。 例如，匹配电路具有L型电路结构，其包括连接到滤波器单元侧并且包括电感器和电容器的电抗元件。 由于滤波器单元包括压电谐振器，阻抗的实数分量随着通带向高频侧的移动而增加，而阻抗的实数分量也随着匹配电路中频率的增加而增加。 因此，实现了阻抗匹配

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