公开(公告)号：US20200067491A1

公开(公告)日：2020-02-27

申请号：US16666559

申请日：2019-10-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Noriyoshi Ota ,  Sunao Yamazaki

IPC: H03H9/72 ,  H03H7/38 ,  H03H9/25 ,  H03H9/64 ,  H03H9/02 ,  H03H9/145 ,  H04B1/52

Abstract: In a multiplexer, input or output terminals of four acoustic wave filters are connected to, among a plurality of terminals provided on piezoelectric substrates, antenna terminals connected to an antenna connection terminal; the four acoustic wave filters include a first acoustic wave filter and a second acoustic wave filter that is located at a farther position from the antenna connection terminal than a position of the first acoustic wave filter in a plan view of a substrate; and among the plurality of terminals, the terminals located at the closest position to the antenna connection terminal in the plan view of the substrate are connected to the second acoustic wave filter as the antenna terminals.

公开(公告)号：US08988170B2

公开(公告)日：2015-03-24

申请号：US13890284

申请日：2013-05-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Sunao Yamazaki ,  Katsuhito Kuroda

IPC: H03H9/72 ,  H03H9/64

CPC classification number: H03H9/64 ,  H03H9/6483

Abstract: An elastic wave filter device has a center frequency of a reception frequency band. A plurality of parallel arms are connected to a portion of a series arm on a second signal terminal side of a portion in which a first series-arm resonator is provided. Series-arm resonators among the plurality of series-arm resonators other than the first series-arm resonator include a series-arm resonator having a resonant frequency higher than the resonant frequency of the first series-arm resonator. The resonant frequency of the first series-arm resonator is equal to the reception frequency band.

Abstract translation: 弹性波滤波器装置具有接收频带的中心频率。 多个并联臂与设置有第一串联臂谐振器的部分的第二信号端子侧连接到串联臂的一部分。 除了第一串联臂谐振器之外的多个串联臂谐振器中的串联臂谐振器包括具有高于第一串联臂谐振器的谐振频率的谐振频率的串联臂谐振器。 第一串联臂谐振器的谐振频率等于接收频带。

公开(公告)号：US10659008B2

公开(公告)日：2020-05-19

申请号：US16666559

申请日：2019-10-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Noriyoshi Ota ,  Sunao Yamazaki

IPC: H03H9/72 ,  H03H7/38 ,  H03H9/25 ,  H04B1/52 ,  H03H9/02 ,  H03H9/145 ,  H03H9/64

Abstract: In a multiplexer, input or output terminals of four acoustic wave filters are connected to, among a plurality of terminals provided on piezoelectric substrates, antenna terminals connected to an antenna connection terminal; the four acoustic wave filters include a first acoustic wave filter and a second acoustic wave filter that is located at a farther position from the antenna connection terminal than a position of the first acoustic wave filter in a plan view of a substrate; and among the plurality of terminals, the terminals located at the closest position to the antenna connection terminal in the plan view of the substrate are connected to the second acoustic wave filter as the antenna terminals.

公开(公告)号：US12278620B2

公开(公告)日：2025-04-15

申请号：US17567920

申请日：2022-01-04

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Sunao Yamazaki

IPC: H03H9/56 ,  H03H9/13 ,  H03H9/54

Abstract: A ladder filter includes series arm resonators, parallel arm resonators, and first and second inductors. Second ends of the parallel arm resonators are connected in common to each other and are connected to a ground potential. A first end of each of the first and second inductors is connected to a series arm, and second ends thereof are connected in common to each other and are connected to the ground potential with a capacitor therebetween.

公开(公告)号：US10230418B2

公开(公告)日：2019-03-12

申请号：US15963569

申请日：2018-04-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Sunao Yamazaki ,  Yuichi Takamine ,  Toshimaro Yoneda

IPC: H04B1/44 ,  H04B1/40 ,  H03F3/19 ,  H01Q1/50 ,  H03F3/24

Abstract: A multiplexer includes a common terminal, a reception terminal, and transmission terminals; a reception filter between the common terminal and the reception terminal; a transmission filter between the common terminal and the transmission terminal; a transmission filter between the common terminal and the transmission terminal; a first inductor connected in series between the common terminal and the reception filter; a second inductor connected between the transmission terminal and the transmission filter; and a third inductor connected between the transmission terminal and the transmission filter. The first inductor and the second inductor couple with each other through a magnetic field, and the first inductor and the third inductor couple with each other through a magnetic field.

公开(公告)号：US10148297B2

公开(公告)日：2018-12-04

申请号：US14135908

申请日：2013-12-20

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Sunao Yamazaki

IPC: H04B1/10 ,  H03H9/64 ,  H03H9/72

Abstract: In a splitter, a first band pass filter is connected between an antenna terminal and a first terminal, a high pass filter and a second band pass filter are connected between the antenna terminal and a second terminal, a pass band of the second band pass filter is higher than a pass band of the first band pass filter, a cut off frequency of the high pass filter is located closer to the high-frequency side than the pass band of the first band pass filter, the pass band of the second band pass filter is located closer to the high-frequency side than the cut off frequency, and the high pass filter also functions as a notch filter having an anti-resonant frequency in a transition region such that the steepness of the transition region between the pass band of the second band pass filter and the attenuated band is high.