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公开(公告)号：US10979096B2
公开(公告)日：2021-04-13
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：US09236657B2
公开(公告)日：2016-01-12
申请号：US14150511
申请日：2014-01-08
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Shoji Nagumo , Minoru Iwanaga , Masahi Nakazato , Tomohiro Nagai
Abstract: A low-frequency radiating element and a high-frequency radiating element are configured so as to respectively operate in a relatively low frequency band and a relatively high frequency band that are non-contiguous with each other. A matching circuit is inserted between a transmission/reception circuit and a branching point. A high-frequency variable reactance circuit is inserted between the branching point and the high-frequency radiating element. A low-frequency variable reactance circuit is inserted between the branching point and the low-frequency radiating element. The high-frequency variable reactance circuit and the low-frequency variable reactance circuit are configured such that their reactances can be adjusted independently of each other.
Abstract translation: 低频辐射元件和高频辐射元件被配置为分别在彼此不连续的相对低的频带和相对较高的频带中工作。 在发送/接收电路和分支点之间插入匹配电路。 在分支点和高频辐射元件之间插入高频可变电抗电路。 在分支点和低频辐射元件之间插入低频可变电抗电路。 高频可变电抗电路和低频可变电抗电路被配置为使得它们的电抗可以彼此独立地调节。
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公开(公告)号：US10886951B2
公开(公告)日：2021-01-05
申请号：US15871662
申请日：2018-01-15
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shoji Nagumo , Kanta Motoki , Keiji Hiejima
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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公开(公告)号：US11336309B2
公开(公告)日：2022-05-17
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：US11276521B2
公开(公告)日：2022-03-15
申请号：US16288140
申请日：2019-02-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kunihiro Miyahara , Yutaka Masuda , Kanta Motoki , Shoji Nagumo
IPC: H01F27/28 , H01F17/00 , H03H7/01 , H03H7/03 , H05K9/00 , H01F27/36 , H01F27/24 , H03H1/00 , H01F27/29
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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Patent Agency Ranking
公开(公告)号：US09866195B2
公开(公告)日：2018-01-09
申请号：US15646774
申请日：2017-07-11
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Shoji Nagumo , Masashi Nakazato , Motoyasu Nakao , Yuji Shintomi
Abstract: A stray capacitance is generated between an antenna element and a ground electrode. A capacitance detection circuit detects the stray capacitance. An antenna matching circuit, is provided along a wireless communication signal path, which is a transmission path between the antenna element and a feeder circuit. A feedback control circuit transmits a control signal to the variable matching circuit on the basis of a detection result of the capacitance detection circuit in accordance with the stray capacitance. The capacitance detection circuit includes a constant current source and a timing circuit to measure the time taken to charge the antenna from the constant current source and for the voltage to reach a predetermined voltage.
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公开(公告)号：US09571145B2
公开(公告)日：2017-02-14
申请号：US14485857
申请日：2014-09-15
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shoji Nagumo , Tetsuro Harada , Minoru Iwanaga , Tomohiro Nagai
CPC classification number: H04B1/18 , H04B1/0458
Abstract: A high frequency circuit module includes a variable inductance circuit portion and a reactance circuit portion. The variable inductance circuit portion is connected between an antenna port and ground. The variable reactance circuit is connected between the antenna port and a front-end port. The variable inductance circuit portion includes a first inductor, a second inductor, and a switch. The first inductor is connected between the antenna port and the ground. The second inductor and the switch are connected in series, and this series circuit is connected in parallel to the first inductor.
Abstract translation: 高频电路模块包括可变电感电路部分和电抗电路部分。 可变电感电路部分连接在天线端口和地之间。 可变电抗电路连接在天线端口和前端口之间。 可变电感电路部分包括第一电感器，第二电感器和开关。 第一个电感连接在天线端口和地之间。 第二电感和开关串联连接，该串联电路与第一电感并联。
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公开(公告)号：US20150084652A1
公开(公告)日：2015-03-26
申请号：US14509896
申请日：2014-10-08
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Shoji Nagumo , Masashi Nakazato , Yujie Dai , Xiaoxing Zhang , Yingjie Lu
IPC: G01R27/26
CPC classification number: G01R27/2605 , H03K17/955 , H03K2217/960745
Abstract: A capacitance detecting circuit includes a constant current source supplying a constant current to a voltage detection point, a time measuring unit measuring time of charge until the voltage of the voltage detection point reaches a prescribed voltage, a storage unit and an operation unit. The storage unit stores first data obtained in advance concerning the time of charge of a capacitance element having a known capacitance value, and second data obtained in advance concerning the time of charge of a capacitance component. The operation unit generates third data representing the time of charge of an object of detection from a difference between the first measurement value of the time measuring unit when the capacitance component is connected to the voltage detection point and the second data, and based on the ratio between the third data and the first data and the known capacitance value, calculates the capacitance value of the object of detection.
Abstract translation: 电容检测电路包括向电压检测点提供恒定电流的恒流源，测量电压直至电压检测点的电压达到规定电压的时间测量单元，存储单元和操作单元。 存储单元存储关于具有已知电容值的电容元件的充电时间预先获得的第一数据和关于电容分量的充电时间预先获得的第二数据。 所述操作部根据与所述电压检测点连接的所述时间测量部的所述第一测量值与所述第二数据之间的差分，生成表示所述检测对象的充电时间的第三数据， 在第三数据与第一数据和已知电容值之间，计算检测对象的电容值。
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公开(公告)号：US09748917B2
公开(公告)日：2017-08-29
申请号：US14331625
申请日：2014-07-15
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Shoji Nagumo , Masashi Nakazato , Motoyasu Nakao , Yuji Shintomi
Abstract: A stray capacitance is generated between an antenna element and a ground electrode. A capacitance detection circuit detects the stray capacitance. An antenna matching circuit, is provided along a wireless communication signal path, which is a transmission path between the antenna element and a feeder circuit. A feedback control circuit transmits a control signal to the variable matching circuit on the basis of a detection result of the capacitance detection circuit in accordance with the stray capacitance. The capacitance detection circuit includes a constant current source and a timing circuit to measure the time taken to charge the antenna from the constant current source and for the voltage to reach a predetermined voltage.
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公开(公告)号：US09188616B2
公开(公告)日：2015-11-17
申请号：US14509896
申请日：2014-10-08
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Shoji Nagumo , Masashi Nakazato , Yujie Dai , Xiaoxing Zhang , Yingjie Lu
IPC: G01R27/26 , H03K17/955
CPC classification number: G01R27/2605 , H03K17/955 , H03K2217/960745
Abstract: A capacitance detecting circuit includes a constant current source supplying a constant current to a voltage detection point, a time measuring unit measuring time of charge until the voltage of the voltage detection point reaches a prescribed voltage, a storage unit and an operation unit. The storage unit stores first data obtained in advance concerning the time of charge of a capacitance element having a known capacitance value, and second data obtained in advance concerning the time of charge of a capacitance component. The operation unit generates third data representing the time of charge of an object of detection from a difference between the first measurement value of the time measuring unit when the capacitance component is connected to the voltage detection point and the second data, and based on the ratio between the third data and the first data and the known capacitance value, calculates the capacitance value of the object of detection.
Abstract translation: 电容检测电路包括向电压检测点提供恒定电流的恒流源，测量电压直至电压检测点的电压达到规定电压的时间测量单元，存储单元和操作单元。 存储单元存储关于具有已知电容值的电容元件的充电时间预先获得的第一数据和关于电容分量的充电时间预先获得的第二数据。 所述操作部根据与所述电压检测点连接的所述时间测量部的所述第一测量值与所述第二数据之间的差分，生成表示所述检测对象的充电时间的第三数据， 在第三数据与第一数据和已知电容值之间，计算检测对象的电容值。
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