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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
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.
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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.
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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
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.
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公开(公告)号：US20200021003A1
公开(公告)日：2020-01-16
申请号：US16578740
申请日：2019-09-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Ryangsu KIM , Katsuya SHIMIZU , Yasushi SHIGENO , Daisuke TOKUDA , Mikiko FUKASAWA
Abstract: Bidirectional detection is performed with a suppressed increase in return loss at an output terminal. A bidirectional coupler includes a detection port, a main line connected to a first port and a second port, a sub-line, a termination circuit, a switch circuit that switches each of one end and another end of the sub-line to the termination circuit or the detection port, and a matching network disposed between the switch circuit and the detection port and including at least one of a first variable capacitor, a first variable inductor, or a first variable resistor. In a first mode for detecting a first signal, the switch circuit connects the one end of the sub-line to the detection port, and connects the other end of the sub-line to the termination circuit.
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公开(公告)号：US20220407211A1
公开(公告)日：2022-12-22
申请号：US17821492
申请日：2022-08-23
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.
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Patent Agency Ranking
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.
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公开(公告)号：US20240128946A1
公开(公告)日：2024-04-18
申请号：US18482199
申请日：2023-10-06
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuuta MIYAZAKI , Katsuya SHIMIZU
Abstract: A directional coupler includes a main line, a sub-line, an output terminal, a first termination circuit, and a termination switch. The sub-line includes a first end and a second end. The output terminal is connected to one end of the first end and the second end. The first termination circuit connects a first output path, which connects the one end and the output terminal, to a ground. The termination switch switches between connection and non-connection between the first output path and the first termination circuit.
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公开(公告)号：US20220077559A1
公开(公告)日：2022-03-10
申请号：US17455250
申请日：2021-11-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenta SEKI , Ryangsu KIM , Katsuya SHIMIZU
IPC: H01P5/18
Abstract: A directional coupler includes a main line, a secondary line, and a variable terminator. The variable terminator includes a variable inductor. The variable inductor includes a plurality of inductors coupled in series with each other between an end portion of the secondary line and the ground and switches configured to bypass at least one inductor of the plurality of inductors.
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公开(公告)号：US20200076045A1
公开(公告)日：2020-03-05
申请号：US16552360
申请日：2019-08-27
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenta SEKI , Ryangsu KIM , Katsuya SHIMIZU
Abstract: A directional coupler includes a main line for transmitting a high frequency signal, a sub line electromagnetically coupled to the main line, a termination circuit for terminating one end portion of the sub line, and a variable filter that has an input terminal and an output terminal and the input terminal is connected to another end portion of the sub line. The variable filter is a filter unit circuit having one frequency band as a pass band or a stop band, and in the filter unit circuit, a variable passive element for shifting a frequency in the pass band or the stop band is disposed.
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公开(公告)号：US20210344096A1
公开(公告)日：2021-11-04
申请号：US17244124
申请日：2021-04-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kenta SEKI , Ryangsu KIM , Kazuhito OSAWA , Katsuya SHIMIZU
Abstract: A directional coupler includes a main line, a sub-line, a coupling terminal, a terminal circuit, a first switching circuit, and a second switching circuit. The first switching circuit and the second switching circuit respectively connects the first end and the second end of the sub-line alternately to the coupling terminal and to the terminal circuit. The first switching circuit connects the first end to the coupling terminal at a time that differs from a time at which the first switching circuit disconnects the first end from the terminal circuit. The first switching circuit disconnects the first end from the coupling terminal at a time that differs from a time at which the first switching circuit connects the first end to the terminal circuit.
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