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公开(公告)号：US11128046B2
公开(公告)日：2021-09-21
申请号：US16354222
申请日：2019-03-15
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kentaro Mikawa , Kenichi Ishizuka , Takafumi Nasu
Abstract: An antenna device includes a radiating element, a coupling circuit, and a non-radiating resonant circuit. The coupling circuit includes first and second coupling elements, the first coupling element being connected between a feeder circuit and the radiating element, the second coupling element being coupled to the first coupling element. An end of the second coupling element is grounded, and another end of the second coupling element is connected to the non-radiating resonant circuit. A frequency characteristic of a return loss of the radiating element when seen from the feeder circuit is adjusted by a resonant frequency characteristic of the non-radiating resonant circuit.
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公开(公告)号：US10707573B2
公开(公告)日：2020-07-07
申请号：US16011710
申请日：2018-06-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kentaro Mikawa , Tsuyoshi Suesada
Abstract: An antenna device includes a first coil antenna conductor including first and second ends, a second coil antenna conductor including third and fourth ends, and a switching circuit. The first coil antenna conductor is wound around an axis and the second coil antenna conductor is wound around an axis. The switching circuit switches a connection state of the first coil antenna conductor and the second coil antenna conductor between connection states including series connection and parallel connection.
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公开(公告)号：US10664738B2
公开(公告)日：2020-05-26
申请号：US15838529
申请日：2017-12-12
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Nobuyuki Tenno , Hiromitsu Ito , Kentaro Mikawa
IPC: H01Q7/00 , G06K19/077 , H01Q7/06 , G06K7/10
Abstract: An antenna device includes first and second coil antennas with winding axis directions that are not perpendicular to each other, and a feeder coil including a winding axis that extends perpendicular or substantially perpendicular to the winding axis of the first coil antenna. The feeder coil is located between the first and second coil antennas in the winding axis direction thereof. A first coil aperture is closer to a coil aperture of the first coil antenna than a second coil aperture. The second coil aperture is closer to a coil aperture of the second coil antenna than the first coil aperture. The first and second coil antennas are connected to each other in a polarity such that magnetic fluxes thereof with respect to the winding axis direction of the first coil antenna are in phase with each other.
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公开(公告)号：US10445635B2
公开(公告)日：2019-10-15
申请号：US15844663
申请日：2017-12-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Nobuyuki Tenno , Hiromitsu Ito , Kentaro Mikawa
IPC: H01Q7/08 , G06K19/077 , H01Q7/06 , G06K7/10 , H01Q7/00
Abstract: An antenna device includes first and second coil antennas with winding axis directions that are not perpendicular to each other, and a feeder coil including a winding axis that extends perpendicular or substantially perpendicular to the winding axis of the first coil antenna. The feeder coil is located between the first coil antenna and the second coil antenna in a height direction (winding axis direction) thereof. A first coil aperture is closer to a coil aperture of the first coil antenna than a second coil aperture. The second coil aperture is closer to a coil aperture of the second coil antenna than the first coil aperture. The first and second coil antennas are connected to each other in a polarity such that magnetic fluxes thereof with respect to the winding axis direction of the first coil antenna are in phase with each other.
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公开(公告)号：US20170153706A1
公开(公告)日：2017-06-01
申请号：US15432122
申请日：2017-02-14
Applicant: Murata Manufacturing Co., Ltd.
Inventor： KENTARO USUI , Junichi Hashimoto , Kentaro Mikawa , Nobuhito Tsubaki
IPC: G06F3/01 , H02N2/00 , B06B1/06 , H01L41/09 , H01L41/193
CPC classification number: G06F3/016 , B06B1/06 , B06B1/0611 , G06F3/041 , H01L41/083 , H01L41/09 , H01L41/0986 , H01L41/193 , H02N2/001
Abstract: A piezoelectric element that includes a plurality of laminated piezoelectric films and adhesive layers. The piezoelectric films stretch and contract in a predetermined direction parallel to principal surfaces thereof when a voltage is applied thereto. The adhesive layers are formed partially between the piezoelectric films when seen from a plan view, are aligned at intervals in the predetermined direction of the stretching and contracting of the piezoelectric films and bond the piezoelectric films to each other. The adhesive layers are formed at both ends of the piezoelectric films in the predetermined direction.
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Patent Agency Ranking
公开(公告)号：US10903571B2
公开(公告)日：2021-01-26
申请号：US16269642
申请日：2019-02-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kentaro Mikawa , Kenichi Ishizuka , Takafumi Nasu
Abstract: A magnetic field coupling element includes conductor patterns stacked with insulating layers interposed therebetween, and interlayer connection conductors that inter-connect the conductor patterns at predetermined positions. The conductor patterns include first, second, third, and fourth conductor patterns, and the interlayer connection conductors include first and second interlayer connection conductors. The first conductor pattern, the second conductor pattern, and the first interlayer connection conductor define a first coil, and the third conductor pattern, the fourth conductor pattern, and the second interlayer connection conductor define a second coil. The first coil and the second coil are disposed in a region of less than about ⅓ of a stacking height of a multi-layer body including the insulating layers.
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公开(公告)号：US20180301805A1
公开(公告)日：2018-10-18
申请号：US16011710
申请日：2018-06-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kentaro Mikawa , Tsuyoshi Suesada
Abstract: An antenna device includes a first coil antenna conductor including first and second ends, a second coil antenna conductor including third and fourth ends, and a switching circuit. The first coil antenna conductor is wound around an axis and the second coil antenna conductor is wound around an axis. The switching circuit switches a connection state of the first coil antenna conductor and the second coil antenna conductor between connection states including series connection and parallel connection.
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公开(公告)号：US10388450B2
公开(公告)日：2019-08-20
申请号：US15715391
申请日：2017-09-26
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Keiichi Ichikawa , Tsuyoshi Suesada , Kentaro Mikawa
Abstract: An inductor module includes a laminate where multiple insulator layers are laminated, a main line conductor in the shape of a straight line formed on the laminate, a current detection conductor that is formed on the laminate and magnetically coupled with the main line conductor, and coil conductors that are formed on the laminate and constitute an inductor element. An absolute value of a coupling coefficient between the main line conductor and inductor element, and an absolute value of a coupling coefficient between the current detection conductor and the inductor element, are each smaller than an absolute value of a coupling coefficient between the main line conductor and the current detection conductor. Thus, an inductor module that detects current and is used as an inductor element, and an electric power transmission system including the inductor module, are provided.
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公开(公告)号：US12218438B2
公开(公告)日：2025-02-04
申请号：US17399166
申请日：2021-08-11
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kentaro Mikawa , Kenichi Ishizuka , Takafumi Nasu
Abstract: An antenna device includes a radiating element, a coupling circuit, and a non-radiating resonant circuit. The coupling circuit includes first and second coupling elements, the first coupling element being connected between a feeder circuit and the radiating element, the second coupling element being coupled to the first coupling element. An end of the second coupling element is grounded, and another end of the second coupling element is connected to the non-radiating resonant circuit. A frequency characteristic of a return loss of the radiating element when seen from the feeder circuit is adjusted by a resonant frequency characteristic of the non-radiating resonant circuit.
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公开(公告)号：US11961651B2
公开(公告)日：2024-04-16
申请号：US17368903
申请日：2021-07-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kentaro Mikawa , Hideaki Kobayashi
CPC classification number: H01F27/2804 , H01F27/29 , H03H7/18 , H04B1/40 , H01F2027/2809
Abstract: In a coil device, a first coil includes a common terminal side first coil conductor connected to a ground terminal, an intermediate first coil conductor, and an input/output terminal side first coil conductor connected to a first input/output terminal, and a second coil includes a common terminal side second coil conductor connected to the ground terminal, an intermediate second coil conductor, and an input/output terminal side second coil conductor connected to a second input/output terminal. The input/output terminal side first coil conductor is located between the intermediate second coil conductor and the input/output terminal side second coil conductor, and the input/output terminal side second coil conductor is located between the intermediate first coil conductor and the input/output terminal side first coil conductor.
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