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公开(公告)号：US20200177214A1
公开(公告)日：2020-06-04
申请号：US16784531
申请日：2020-02-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shoji NAGUMO , Kanta MOTOKI , Shiyunsuke OOTOMO
Abstract: A front-end module includes: a first front-end circuit that transmits signals in a first band in a CA mode; and a second front-end circuit that transmits signals in a second band in the CA mode. The second front-end circuit includes a second quadplexer for the first and second bands. The first front-end circuit includes: a first quadplexer for the first and second bands; and an impedance variable circuit that is connected to a transmission terminal that is included in the first quadplexer and corresponds to the second band. In the CA mode, the impedance variable circuit serves as a reflection circuit that causes reflection of transmission waves in the second band. In a non-CA mode, the impedance variable circuit serves as a matching circuit that transmits or absorbs transmission waves in the second band.
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公开(公告)号：US20250023586A1
公开(公告)日：2025-01-16
申请号：US18896950
申请日：2024-09-26
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Motoji TSUDA , Kei MATSUTANI , Kanta MOTOKI , Reiji NAKAJIMA , Yuji TAKEMATSU
Abstract: A radio frequency circuit includes an antenna connection terminal, an input terminal, an output terminal, a filter having a pass band including at least part of a transmission band of Band A for FDD, a filter having a pass band including at least part of a reception band of the Band A, and a switch that includes terminals. The antenna connection terminal is connected to the terminal. The filter is connected between the terminal and the input terminal. The filter is connected between the terminal and the output terminal. The switch is configured to switch between first connection, second connection, and third connection. In the first connection, the terminal is connected to the terminal and the terminal is not connected to the terminal. In the second connection, the terminal is connected to the terminal and the terminal is not connected to the terminal.
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公开(公告)号：US20180138927A1
公开(公告)日：2018-05-17
申请号：US15871662
申请日：2018-01-15
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shoji NAGUMO , Kanta MOTOKI , Keiji HIEJIMA
CPC classification number: H04B1/006 , H04B1/0057 , H04B1/0067 , H04B1/3833 , H04B1/48 , H04B1/54 , H04B1/69 , H04J3/00 , H04L5/001 , H04L5/0023 , H04L5/1469
Abstract: A front-end module that uses a carrier aggregation scheme in which Band, which is selected from a low-frequency band group, and Band, which is selected from a high-frequency band group, are used simultaneously for communication includes a plurality of signal paths that connect a power amplifier module to an antenna element, and an antenna switch module that switches connection between the antenna element and the plurality of signal paths. Harmonics of Band have frequencies that are included in Band. The front-end module further includes a switch element disposed in a TDD transmission path.
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Patent Agency Ranking
公开(公告)号：US20150194943A1
公开(公告)日：2015-07-09
申请号：US14661181
申请日：2015-03-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kanta MOTOKI , Sayyed TABIB , Saneaki ARIUMI
IPC: H03H7/01
CPC classification number: H03H7/0138 , H01G4/40 , H03H7/0115 , H03H2001/0085 , H05K1/0233 , H05K1/162 , H05K1/165 , H05K1/181 , H05K3/403 , H05K2201/083
Abstract: A built-in-circuit substrate includes a substrate body, an electrical circuit including inner electrodes provided inside the substrate body and to which an RF signal is input, outer electrodes which are provided on the substrate body so as to be connected to the electrical circuit and which each include an underlying metal layer and a nickel layer covering at least a portion of the underlying metal layer, and a permanent magnet which is arranged on the substrate body. Thus, noise caused by intermodulation distortion generated in the nickel layers of the outer electrodes is prevented.
Abstract translation: 内置电路基板包括基板主体，电路，包括设置在基板本体内并且输入RF信号的内部电极，设置在基板主体上以连接到电路的外部电极 并且其各自包括底层金属层和覆盖下面的金属层的至少一部分的镍层和布置在基底主体上的永磁体。 因此，防止在外部电极的镍层中产生的互调失真引起的噪声。
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公开(公告)号：US20240063842A1
公开(公告)日：2024-02-22
申请号：US18498481
申请日：2023-10-31
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kanta MOTOKI , Hiroyuki SATAKE , Hiromu HORAGUCHI
IPC: H04B1/525
CPC classification number: H04B1/525
Abstract: A radio frequency circuit is capable of simultaneously transmitting a signal of a band A and a signal of a band B, a second downlink operation band of the band B overlapping (2×f2−f1), where f1 is a frequency of a first uplink operation band of the band A, and f2 is a frequency of a second uplink operation band of the band B, the radio frequency circuit including antenna connection terminals connected to different antennas, a filter that is connected to the antenna connection terminal and has a pass band that includes the first uplink operation band, a filter that is connected to the antenna connection terminal and has a pass band that includes the second uplink operation band, and a filter that is connected to the antenna connection terminal and has a pass band that includes a second downlink operation band.
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公开(公告)号：US20190222253A1
公开(公告)日：2019-07-18
申请号：US16360058
申请日：2019-03-21
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shoji NAGUMO , Kanta MOTOKI , Yusaku MUROYA
Abstract: A high-frequency front-end circuit includes a diplexer, a duplexer, and a low-band-side multiple reflection prevention unit. The diplexer includes an antenna connection terminal, a low-band-side terminal, and a high-band-side terminal, and separates a low-band communication signal and a high-band communication signal. The duplexer separates a transmission signal and a reception signal of the low-band communication signal. The multiple reflection prevention unit is disposed between the low-band-side terminal and the duplexer and reduces or prevents multiple reflections of a leakage signal of the high-band communication signal which leaks to the low band side.
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公开(公告)号：US20200302314A1
公开(公告)日：2020-09-24
申请号：US16821203
申请日：2020-03-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yusaku MUROYA , Kanta MOTOKI , Yasunori DAIDOU
Abstract: A model generation system is a system for supporting the design of a transmitter circuit including a power amplifier. The model generation system includes an acquisition unit and a model generation unit. The acquisition unit acquires amplification performance data relating to performance of the transmitter circuit. The model generation unit generates an inference model on the basis of input data and output data using machine learning in which at least the amplification performance data is the input data and a characteristic value of the transmitter circuit is the output data.
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公开(公告)号：US20190198230A1
公开(公告)日：2019-06-27
申请号：US16288140
申请日：2019-02-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kunihiro MIYAHARA , Yutaka MASUDA , Kanta MOTOKI , Shoji NAGUMO
CPC classification number: H01F27/2885 , H01F27/24 , H01F27/2804 , H01F27/29 , H01F2027/2809 , H03H1/00 , H03H7/01 , H03H2001/0092 , H05K9/00
Abstract: An electronic component includes a multilayer body including dielectric layers, a circuit pattern, and band-shaped conductor patterns. The circuit pattern includes a conductor pattern that is disposed inside the multilayer body and defines an inductor. The band-shaped conductor patterns are grounded and cover a portion of a shield surface. An internal surface is located between the circuit pattern and an upper surface. On a shield surface, a non-shielded area is provided which is not covered with any of the band-shaped conductor patterns, and through which magnetic flux generated from the inductor is able to pass.
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