公开(公告)号：US20210376441A1

公开(公告)日：2021-12-02

申请号：US17331080

申请日：2021-05-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Daisuke TOKUDA ,  Katsuya SHIMIZU ,  Kenta SEKI ,  Ryangsu KIM

IPC: H01P5/18

Abstract: A directional coupler includes a main line, a sub-line electromagnetically coupled with the main line, a coupled output terminal, plural filters, filter switching circuits, and plural filter protecting switches. Each of the filter switching circuits is able to connect a corresponding one of the plural filters to one end of the sub-line and to the coupled output terminal. Each of the filter protecting switches is directly connected to a corresponding end of a corresponding one of the plural filters and is able to switch between a connection state and a disconnection state. The connection state is a state in which the corresponding end of the corresponding one of the plural filters is connected to a reference potential. The disconnection state is a state in which the corresponding end of the corresponding one of the plural filters is disconnected from the reference potential.

公开(公告)号：US20220077560A1

公开(公告)日：2022-03-10

申请号：US17461099

申请日：2021-08-30

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenta SEKI ,  Ryangsu KIM ,  Kazuhito OSAWA

IPC: H01P5/18

Abstract: A directional coupler includes a multilayer body, a conductor (31), and a conductor (32). The conductor (31) is a conductor that is arranged in an insulating layer (21) of the multilayer body and that extends in a certain shape. The conductor (32) is arranged on a side of an insulating layer (22) of the multilayer body opposite the insulating layer (21). The conductor (32) runs parallel to the conductor (31) and is electromagnetically coupled to the conductor (31). The conductor (32) has a winding shape with one or more rounds, and has a conductor portion (321) and a conductor portion (325) that are arranged adjacent to each other with a spacing in a direction orthogonal to a running parallel direction. In plan view of the multilayer body, the conductor (31) is arranged between the conductor portion (321) and the conductor portion (325).

公开(公告)号：US20210184328A1

公开(公告)日：2021-06-17

申请号：US17186171

申请日：2021-02-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenta SEKI ,  Ryangsu KIM ,  Katsuya SHIMIZU

IPC: H01P5/18 ,  H01P1/10 ,  H03H7/38

Abstract: A directional coupler includes a main line and a sub-line electromagnetically coupled to each other, a variable termination circuit that is connected to one end of the sub-line and that has a variable impedance, a variable matching circuit that is connected to the other end of the sub-line and that has a variable impedance or a variable attenuator that has a variable attenuation, and a control circuit that controls the impedance of the variable termination circuit and that controls the impedance of the variable matching circuit or the attenuation of the variable attenuator. The control circuit includes a non-volatile memory and controls the impedance of the variable termination circuit in accordance with data stored in the memory.

公开(公告)号：US20210036396A1

公开(公告)日：2021-02-04

申请号：US16941862

申请日：2020-07-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenta SEKI ,  Yasushi SHIGENO ,  Daisuke TOKUDA ,  Ryangsu KIM ,  Katsuya SHIMIZU ,  Kazuhito OSAWA

IPC: H01P5/18

Abstract: A directional coupler includes a main line, a first sub-line to be electromagnetically coupled to the main line, a second sub-line to be electromagnetically coupled to the main line, and a coupling terminal configured to output a detection signal corresponding to a radio frequency signal that is transmitted through the main line, the first sub-line and the second sub-line are different in length from each other, and connection between the first sub-line and the coupling terminal and connection between the second sub-line and the coupling terminal are switched.

公开(公告)号：US20210036395A1

公开(公告)日：2021-02-04

申请号：US16941577

申请日：2020-07-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenta SEKI ,  Yasushi SHIGENO ,  Daisuke TOKUDA ,  Ryangsu KIM ,  Katsuya SHIMIZU ,  Kazuhito OSAWA

IPC: H01P5/18 ,  H04B1/04 ,  H01G4/40 ,  H03H7/01

Abstract: A directional coupler includes a main line through which a signal is transmitted, first and second sub-lines that are selectively coupled to the main line, and a common output port that outputs a detection signal generated by the signal transmitted through the main line, wherein a first degree of coupling between the main line and the first sub-line is different than a second degree of coupling between the main line and the second sub-line.