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公开(公告)号：US20240333323A1
公开(公告)日：2024-10-03
申请号：US18624196
申请日：2024-04-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Reiji NAKAJIMA , Takahisa TOYOMURA , Kazuhiro UEDA
CPC classification number: H04B1/0483 , H04B1/006 , H04B1/0458
Abstract: A radio frequency module includes a first power amplifier, a second power amplifier, and a matching circuit. The matching circuit is connected to an output terminal of the second power amplifier and is connected to a reception path. The matching circuit includes at least one capacitor, an inductor connected in series to the at least one capacitor, and a selection switch. The matching circuit switches between an impedance matching function and a harmonic wave suppression function of reducing harmonic wave noise outputted from the first power amplifier by switching a state of the selection switch.
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公开(公告)号：US20230017570A1
公开(公告)日：2023-01-19
申请号：US17934692
申请日：2022-09-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Reiji NAKAJIMA
Abstract: Loss in a low-pass filter is reduced. A radio-frequency module includes an antenna terminal, a power amplifier, a low-noise amplifier, and a low-pass filter. The low-pass filter is disposed on a transmit path between the antenna terminal and the power amplifier and on a receive path between the antenna terminal and the low-noise amplifier. The low-pass filter has multiple paths. Each of the paths forms a part of either one or both of the transmit path and the receive path. The paths include a first path and a second path. The second path has a smaller reactance than the first path.
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公开(公告)号：US20180226928A1
公开(公告)日：2018-08-09
申请号：US15941043
申请日：2018-03-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Hidenori OBIYA , Shinya HITOMI , Reiji NAKAJIMA
CPC classification number: H03F3/245 , H03F1/56 , H03F3/195 , H03F3/72 , H03F2200/111 , H03F2200/451 , H03F2203/7209 , H03G3/3042 , H03G5/28 , H04B1/00 , H04B1/0057 , H04B1/04 , H04B1/0458 , H04B1/18 , H04B1/40 , H04B1/48 , H04B2001/0408
Abstract: A PA module includes a previous stage amplification element to amplify a high-frequency signal, a posterior stage amplification element to amplify the high-frequency signal amplified by the previous stage amplification element, and a variable filter circuit arranged between the previous stage amplification element and the posterior stage amplification element and to vary a pass band and an attenuation band in accordance with a frequency band of the high-frequency signal, in which the variable filter circuit includes a filter portion and switches, the previous stage amplification element, the switches, and the posterior stage amplification element are arranged on a mounting surface of a substrate, the filter portion is stacked and arranged so as to overlap with at least one of the previous stage amplification element, the switches, and the posterior stage amplification element when the substrate is viewed in a plan view.
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公开(公告)号：US20150061788A1
公开(公告)日：2015-03-05
申请号：US14534423
申请日：2014-11-06
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Reiji NAKAJIMA , Toshihiro MAKINO
IPC: H01P1/387
Abstract: In a non-reciprocal circuit device, a first center conductor, a second center conductor, and a third center conductor are disposed on a ferrite, to which a direct current magnetic field is applied by a permanent magnet, so as to be insulated from one another and so as to intersect with one another. One end of the first center conductor defines a first port, one end of the second center conductor defines a second port, and one end of the third center conductor defines a third port. The first port is connected to a first terminal, the second port is connected to a second terminal, and the third port is connected to a third terminal. The other ends of the respective center conductors are connected to one another, which is connected to a ground. Capacitance elements are connected in parallel to the respective center conductors.
Abstract translation: 在不可逆电路装置中，第一中心导体，第二中心导体和第三中心导体设置在由永久磁铁施加直流磁场的铁氧体上，以与其绝缘 另一个，以便相互交叉。 第一中心导体的一端限定第一端口，第二中心导体的一端限定第二端口，第三中心导体的一端限定第三端口。 第一端口连接到第一端子，第二端口连接到第二端子，第三端口连接到第三端子。 各个中心导体的另一端彼此连接，并连接到地面。 电容元件与各自的中心导体并联连接。
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公开(公告)号：US20240396575A1
公开(公告)日：2024-11-28
申请号：US18443356
申请日：2024-02-16
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Reiji NAKAJIMA , Hiroyuki KANI , Morio TAKEUCHI
Abstract: A radio-frequency module includes a module substrate having first and second major surfaces, a transmit filter disposed at the module substrate, a duplexer that is disposed at the module substrate and that includes a transmit filter and a receive filter, an antenna switch to selectively couple the transmit filter or the duplexer, and a switch to selectively couple the transmit filter or the transmit filter. The transmit filter has a pass band that includes an uplink operating band of a first band for frequency division duplex. The transmit filter has a pass band that includes the uplink operating band of the first band. The receive filter has a pass band that includes a downlink operating band of the first band. The transmit filter and the receive filter are stacked together and positioned beside the first major surface.
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Patent Agency Ranking
公开(公告)号：US20240088848A1
公开(公告)日：2024-03-14
申请号：US18505419
申请日：2023-11-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Hiroshi KOJIMA , Reiji NAKAJIMA , Hirotsugu MORI
CPC classification number: H03F3/245 , H03F3/19 , H03F3/211 , H04W52/00 , H03F2200/451
Abstract: A radio frequency circuit includes: an amplifier circuit configured to amplify a first radio frequency signal using a first power supply voltage, and amplify a second radio frequency signal using a second power supply voltage. The first radio frequency signal is a signal in a first band for Long Term Evolution (LTE), the second radio frequency signal is a signal in a second band for 5th Generation New Radio (5G NR) or a wireless local area network (WLAN) signal, and in a state in which a first predetermined condition regarding the first radio frequency signal and the second radio frequency signal is satisfied, a value of the second power supply voltage is greater than a value of the first power supply voltage.
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公开(公告)号：US20240039528A1
公开(公告)日：2024-02-01
申请号：US18330376
申请日：2023-06-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Reiji NAKAJIMA , Naoya MATSUMOTO
IPC: H03K17/687 , H03H11/04
CPC classification number: H03K17/6871 , H03H11/04
Abstract: A switch circuit includes: first through third common terminals; a first selection terminal that can be connected to the first through third common terminals; second and third selection terminals that can be connected to the first and third common terminals via a first node and can be connected to the first and second common terminals via a second node; first through third switches connected between the first through third common terminals and the first selection terminal; fourth through fifth switches connected between the first and third common terminals and the first node; sixth and seventh switches connected between the first and second common terminals and the second node; eighth and ninth switches connected between the second and third selection terminals and the first node; and tenth and eleventh switches connected between the second and third selection terminals and the second node.
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公开(公告)号：US20210143847A1
公开(公告)日：2021-05-13
申请号：US17153197
申请日：2021-01-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Reiji NAKAJIMA
Abstract: A radio frequency (RF) front end module is capable of simultaneously transmitting an RF signal of a first communication channel in a communication band (CB) to which communication channels are allocated and an RF signal of a second communication channel of the CB. The module includes a common terminal, a power amplifier to which RF signals of the first and second communication channels are simultaneously input, a multiplexer that has a transmission filter unit and a reception filter unit connected to the common terminal and treating a transmission bandwidth of the CB and a reception bandwidth of the CB, respectively, as a pass band, and a transmission filter arranged between an output terminal of the power amplifier and an input terminal of the transmission filter unit and treating a bandwidth including the transmission bandwidth as a pass band and a bandwidth including the reception bandwidth as an attenuation band.
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公开(公告)号：US20140080431A1
公开(公告)日：2014-03-20
申请号：US14088470
申请日：2013-11-25
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takaya WADA , Reiji NAKAJIMA
Abstract: A non-reciprocal circuit element includes a ferrite, a first central electrode and a second central electrode arranged on the ferrite so as to cross each other in an insulated state, and a permanent magnet that applies a DC magnetic field to a portion where the first and second central electrodes cross each other. One end of the first central electrode defines an input port, and the other end thereof defines an output port. One end of the second central electrode defines the input port, and the other end thereof defines a ground port. A resistance element and a capacitance element, which are connected in parallel with each other, are connected in series with and between the input port and the output port. Input impedance is lowered by making inductance of the second central electrode relatively large.
Abstract translation: 不可逆电路元件包括铁氧体，第一中心电极和布置在铁氧体上以在绝缘状态彼此交叉的第二中心电极，以及永磁体，其将DC磁场施加到第一 并且第二中心电极彼此交叉。 第一中心电极的一端限定输入端口，另一端限定输出端口。 第二中心电极的一端限定输入端口，另一端限定接地端口。 彼此并联连接的电阻元件和电容元件与输入端口和输出端口串联连接。 通过使第二中心电极的电感相对较大来降低输入阻抗。
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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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