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    ELASTIC WAVE DEVICE, FILTER, SPLITTER, AND COMMUNICATION DEVICE
    1.
    发明公开
    ELASTIC WAVE DEVICE, FILTER, SPLITTER, AND COMMUNICATION DEVICE 审中-公开

    公开(公告)号：US20240339986A1

    公开(公告)日：2024-10-10

    申请号：US18576874

    申请日：2022-07-08

    申请人： KYOCERA Corporation

    发明人： Tomio KANAZAWA

    IPC分类号： H03H9/02 ,  H03H9/145 ,  H03H9/25 ,  H03H9/64

    CPC分类号： H03H9/02992 ,  H03H9/145 ,  H03H9/25 ,  H03H9/6483

    摘要： An IDT electrode includes: a first busbar, a second busbar facing the first busbar, multiple first electrode fingers electrically connected to the first busbar, multiple second electrode fingers electrically connected to the second busbar and arranged in an alternating manner with the multiple first electrode fingers in an acoustic wave propagation direction, multiple bar electrodes interposed between the first busbar and the multiple first electrode fingers, and extending parallel to the first busbar and parallel to each other, multiple connection portions including a connection portion that is interposed between the first busbar and a corresponding one of the bar electrodes adjacent to the first busbar and that connects the first busbar to the corresponding bar electrode, and a connection portion that connects adjacent bar electrodes to each other. Some of the connection portions are disposed in a discontinuous manner with respect to an extension direction of the multiple electrode fingers.

    RESONATOR-BASED FILTER
    2.
    发明公开
    RESONATOR-BASED FILTER 审中-公开

    公开(公告)号：US20240291467A1

    公开(公告)日：2024-08-29

    申请号：US18175132

    申请日：2023-02-27

    申请人： TEXAS INSTRUMENTS INCORPORATED

    发明人： YAO YU ,  TING-TA YEN

    IPC分类号： H03H9/60 ,  H03H9/54 ,  H03H9/64

    CPC分类号： H03H9/605 ,  H03H9/542 ,  H03H9/6483

    摘要： An integrated circuit (IC) includes a filter circuit having a first input/output (I/O) filter terminal, a second I/O filter terminal, and a reference terminal. The filter circuit includes first and second resonators and first and second inductors. The first resonator has first and second resonator terminals. The first resonator terminal is electrically coupled to the first I/O filter terminal. The second resonator terminal is electrically coupled to the second I/O filter terminal. The second resonator has third and fourth resonator terminals. The third resonator terminal is electrically coupled to the first I/O filter terminal. The first inductor is electrically coupled between the second resonator terminal and the reference terminal. The second inductor is electrically coupled between the fourth resonator terminal and the reference terminal. The second inductor is magnetically coupled to the first inductor.

    ACOUSTIC WAVE DEVICE AND METHOD FOR PRODUCING SAME
    4.
    发明公开
    ACOUSTIC WAVE DEVICE AND METHOD FOR PRODUCING SAME 审中-公开

    公开(公告)号：US20240258983A1

    公开(公告)日：2024-08-01

    申请号：US18424288

    申请日：2024-01-26

    申请人： Sanan Japan Technology Corporation

    发明人： SUBEI SHUN ,  Shinichi Shioi

    IPC分类号： H03H3/08 ,  H03H9/02 ,  H03H9/64

    CPC分类号： H03H3/08 ,  H03H9/02543 ,  H03H9/02834 ,  H03H9/6483

    摘要： An acoustic wave device includes a high acoustic velocity substrate, a medium acoustic velocity layer formed on the main surface of the high acoustic velocity substrate, and a piezoelectric substrate formed directly or via another layer on the main surface of the medium acoustic velocity layer, wherein an acoustic velocity is slowed down gradually from the main surface of the high acoustic velocity substrate toward the main surface of the medium acoustic velocity layer between the high acoustic velocity substrate and the medium acoustic velocity layer; and a method for producing the same.

    High quality factor transducers for surface acoustic wave devices
    5.
    发明授权
    High quality factor transducers for surface acoustic wave devices 有权

    公开(公告)号：US12052011B2

    公开(公告)日：2024-07-30

    申请号：US17527375

    申请日：2021-11-16

    申请人： Qorvo US, Inc.

    发明人： Marc Solal ,  Shogo Inoue

    IPC分类号： H03H9/145 ,  H03H9/02 ,  H03H9/25 ,  H03H9/64

    CPC分类号： H03H9/1457 ,  H03H9/02559 ,  H03H9/25 ,  H03H9/6483 ,  H03H9/6489

    摘要： The present disclosure relates to acoustic wave devices, and particularly to high quality factor (Q) transducers for surface acoustic wave (SAW) devices. An exemplary SAW device includes an interdigital transducer (IDT) between two reflective gratings to form a resonator. The resonator operates through shear horizontal mode acoustic waves, and therefore suppression of transverse modes (parallel to electrode fingers of the IDT) is desired. A piston mode can be formed in the resonator to suppress transverse modes, which may also increase energy leakage and result in a lower Q. A higher Q is achieved by adding a fast region at an end of one or more of the electrode fingers of the IDT.

    RADIO FREQUENCY MODULE
    6.
    发明公开
    RADIO FREQUENCY MODULE 审中-公开

    公开(公告)号：US20240204750A1

    公开(公告)日：2024-06-20

    申请号：US18483531

    申请日：2023-10-10

    申请人： Murata Manufacturing Co., Ltd.

    发明人： Takanori ITO

    IPC分类号： H03H9/25 ,  H03H9/64 ,  H03H9/72 ,  H04B1/04

    CPC分类号： H03H9/25 ,  H03H9/6483 ,  H03H9/725 ,  H04B1/0483

    摘要： A radio frequency module includes a filter having plural serial arm resonators and one or more parallel arm resonators, an inductor connected to a second path connecting an input/output terminal to the filter, and a parallel arm circuit connected between the ground and a first parallel arm resonator among the one or more parallel arm resonators. The parallel arm circuit includes inductors and a switch having a common terminal, selection terminals. The selection terminal is connected to a first end of the inductor. The selection terminal is connected to a first end of the inductor. The common terminal is connected to the first parallel arm resonator. The inductor and the inductor are connected, at their second ends, to the ground.

    Multiplexer
    8.
    发明授权
    Multiplexer 有权

    公开(公告)号：US11984913B2

    公开(公告)日：2024-05-14

    申请号：US17341477

    申请日：2021-06-08

    申请人： Murata Manufacturing Co., Ltd.

    发明人： Tetsuro Okuda

    IPC分类号： H04B1/00 ,  H03H3/02 ,  H03H9/64 ,  H04B1/04

    CPC分类号： H04B1/0078 ,  H03H3/02 ,  H03H9/6483 ,  H04B1/0057 ,  H04B1/0483 ,  H03H2003/027

    摘要： 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.