公开(公告)号：US11736077B2

公开(公告)日：2023-08-22

申请号：US17338697

申请日：2021-06-04

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Morio Takeuchi ,  Shigeru Tsuchida ,  Yukiya Yamaguchi

IPC: H04W88/02 ,  H03F3/24 ,  H03F1/56 ,  H04L5/14 ,  H04B1/40

CPC classification number: H03F3/245 ,  H03F1/56 ,  H04B1/40 ,  H04L5/14 ,  H03F2200/222 ,  H03F2200/387 ,  H03F2200/451

Abstract: A radio-frequency module includes a first power amplifier, a second power amplifier, a switch, a plurality of first filters, and a second filter. The first power amplifier amplifies a transmission signal of a first frequency band and outputs the amplified transmission signal. The second power amplifier amplifies a transmission signal of a second frequency band and outputs the amplified transmission signal. The pass bands of the plurality of first filters are contained within the first frequency band. The pass band of the second filter is contained within the second frequency band. The second power amplifier has a greater output power level than the first power amplifier. The first output terminal of the first power amplifier is switchably connectable to the plurality of first filters via the switch. The second output terminal of the second power amplifier is connected to the second filter without the switch interposed therebetween.

公开(公告)号：US10979087B1

公开(公告)日：2021-04-13

申请号：US17022091

申请日：2020-09-16

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takayuki Shinozaki ,  Yukiya Yamaguchi ,  Morio Takeuchi ,  Yoichi Sawada

IPC: H04B1/00 ,  H04B1/44

Abstract: A radio frequency module includes a module board including a first principal surface and a second principal surface on opposite sides thereof; a transmission power amplifier; a control circuit configured to control the transmission power amplifier; a first transmission filter and a second transmission filter; and a first switch configured to switch connection of an output terminal of the transmission power amplifier between the first transmission filter and the second transmission filter. The control circuit is disposed on the first principal surface, and the first switch is disposed on the second principal surface.

公开(公告)号：US10756768B2

公开(公告)日：2020-08-25

申请号：US16360248

申请日：2019-03-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Daisuke Miyazaki ,  Morio Takeuchi

IPC: H04B1/00 ,  H04B1/40 ,  H04B1/16 ,  H03H9/70 ,  H03H9/72

Abstract: A radio-frequency front-end circuit includes first and second filters, and first and second band elimination filters. The first filter is connected between an antenna common terminal and a first input-output terminal, and has a first frequency band as a pass band. The second filter is connected between the antenna common terminal and a second input-output terminal, and has a second frequency band as a pass band. The first band elimination filter is connected between the antenna common terminal and a third input-output terminal, and has the first frequency band as a stop band. The second band elimination filter is connected in series with the first band elimination filter between the antenna common terminal and the third input-output terminal, and has the second frequency band as a stop band.

公开(公告)号：US20190296708A1

公开(公告)日：2019-09-26

申请号：US16438594

申请日：2019-06-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Morio Takeuchi

IPC: H03H7/38 ,  H04B1/00 ,  H04B1/50 ,  H03H9/70 ,  H03H7/46 ,  H04B1/40 ,  H04B1/18

Abstract: A radio-frequency module utilizing carrier aggregation includes a switch circuit that includes one input terminal and three or more output terminals and that simultaneously connects the input terminal and each of two or more output terminals selected from the output terminals, signal paths that propagate signals of corresponding frequency bands, band pass filters in the signal paths, and variable matching circuits in the signal paths. The circuit states of the variable matching circuits are changed in accordance with a combination of two or more signal paths simultaneously connected to the input terminal.

公开(公告)号：US10396749B2

公开(公告)日：2019-08-27

申请号：US15860694

申请日：2018-01-03

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Morio Takeuchi

IPC: H04B1/00 ,  H03H7/38 ,  H04B1/18 ,  H04B1/40 ,  H04B1/50 ,  H03H7/46 ,  H03H9/70 ,  H03H9/00 ,  H03H7/20

Abstract: A radio-frequency module utilizing carrier aggregation includes a switch circuit that includes one input terminal and three or more output terminals and that simultaneously connects the input terminal and each of two or more output terminals selected from the output terminals, signal paths that propagate signals of corresponding frequency bands, band pass filters in the signal paths, and variable matching circuits in the signal paths. The circuit states of the variable matching circuits are changed in accordance with a combination of two or more signal paths simultaneously connected to the input terminal.

公开(公告)号：US10128816B2

公开(公告)日：2018-11-13

申请号：US15205090

申请日：2016-07-08

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Morio Takeuchi ,  Koichiro Kawasaki ,  Yohei Konaka

IPC: H03H9/72 ,  H03H9/64 ,  H03H9/05 ,  H03H9/10 ,  H03H9/00 ,  H05K1/02 ,  H03H7/09

Abstract: In a high frequency module, in addition to a main transmission path in which a high-frequency signal propagates in first filter elements, a sub transmission path is defined by inductive coupling or capacitive coupling between a first inductor and a matching element or by inductive coupling between the first inductor and a second inductor. The sub transmission path has different amplitude characteristics and phase characteristics from those of the main transmission path depending on a degree of the inductive coupling or capacitive coupling, and transmission characteristics as a high-frequency module are adjustable by adjusting the amplitude characteristics and the phase characteristics of the sub transmission path.

公开(公告)号：US09998097B2

公开(公告)日：2018-06-12

申请号：US15646334

申请日：2017-07-11

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Morio Takeuchi ,  Daisuke Miyazaki ,  Tetsuro Okuda

IPC: H03H9/70 ,  H04B1/40 ,  H03H9/58 ,  H03H9/205 ,  H03H9/02

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.

公开(公告)号：US09979379B2

公开(公告)日：2018-05-22

申请号：US15647514

申请日：2017-07-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Junpei Yasuda ,  Morio Takeuchi

IPC: H03H9/72 ,  H01P1/213

CPC classification number: H03H9/72 ,  H01P1/213 ,  H01P5/12 ,  H03H9/725

Abstract: A multiplexer includes a n number (n is an integer equal to three or more) of filters that are individually provided in the n number of paths commonly connected at a common junction point, and that have different pass bands from one another. In the multiplexer, (n−1) filters among the n number of filters except for the first filter have impedances of which imaginary components cancel each other at a pass band frequency of the first filter when viewed from the common junction point in a state of the n number of paths being not commonly connected.

公开(公告)号：US11916521B2

公开(公告)日：2024-02-27

申请号：US17341393

申请日：2021-06-08

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yoshito Matsumura ,  Morio Takeuchi ,  Yukiya Yamaguchi ,  Shigeru Tsuchida ,  Hidetaka Takahashi

IPC: H04B1/04 ,  H03F3/21 ,  H03F1/56 ,  H04B1/00

CPC classification number: H03F3/211 ,  H03F1/56 ,  H04B1/006 ,  H04B1/0475 ,  H03F2200/387 ,  H03F2200/451 ,  H04B2001/0408

Abstract: A radio-frequency module includes a mounting substrate and first and second power amplifiers. The first and second power amplifiers are each mounted on one main surface of the mounting substrate. The first power amplifier includes a first input terminal and a first outer periphery. The first outer periphery includes a first edge section. The second power amplifier includes a second input terminal and a second outer periphery. The second outer periphery includes a second edge section. The second edge section opposes the first edge section in a first direction. The first input terminal is disposed in the first edge section of the first power amplifier. The second input terminal is disposed in the second edge section of the second power amplifier. The first and second input terminals do not overlap each other in the first direction.

公开(公告)号：US11799516B2

公开(公告)日：2023-10-24

申请号：US17658899

申请日：2022-04-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Morio Takeuchi ,  Syunsuke Kido

IPC: H04B1/7163 ,  H03F3/19 ,  H03H9/54 ,  H03H7/01 ,  H03H9/64

CPC classification number: H04B1/71637 ,  H03F3/19 ,  H03H7/0115 ,  H03H9/54 ,  H03H9/64 ,  H03F2200/165 ,  H03F2200/294 ,  H03F2200/451

Abstract: A radio frequency circuit includes a first acoustic wave filter that is connected to a common terminal and includes a first acoustic wave resonator, a first LC filter that is connected to the common terminal via the first acoustic wave filter and includes at least one of an inductor or a capacitor, a second acoustic wave filter that is connected to the common terminal and includes a second acoustic wave resonator, and a second LC filter that is connected to the common terminal via the second acoustic wave filter and includes at least one of an inductor or a capacitor.