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公开(公告)号：US10432161B2
公开(公告)日：2019-10-01
申请号：US15877534
申请日：2018-01-23
Applicant: TDK CORPORATION
Inventor： Yuta Ashida , Naoki Sotoma , Shigemitsu Tomaki , Yasuyuki Hiwatashi
Abstract: A band-pass filter includes a main body formed of a dielectric, a plurality of resonators, a shield, and a partition formed of a conductor. Each of the plurality of resonators includes a resonator conductor portion. The resonator conductor portion has a first end and a second end opposite to each other in the longitudinal direction. The first end is connected to a ground, and the second end is open. The partition extends to pass through between the respective resonator conductor portions of two resonators, and is electrically connected to the shield.
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公开(公告)号：US12294131B2
公开(公告)日：2025-05-06
申请号：US17968214
申请日：2022-10-18
Applicant: TDK CORPORATION
Inventor： Longfei Yi , Shigemitsu Tomaki
Abstract: A filter device includes first to third resonators. Each of the first to third resonators includes a first line part and a second line part electrically connected to the first line part and having an impedance smaller than an impedance of the first line part. The impedance ratio in at least one of the first to third resonators is 0.3 or smaller. The shape of each of the second line part of the first resonator and the second line part of the second resonator is long in a direction orthogonal to a stacking direction and crossing the longitudinal direction of the second line part of the third resonator.
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公开(公告)号：US11081767B2
公开(公告)日：2021-08-03
申请号：US16816929
申请日：2020-03-12
Applicant: TDK CORPORATION
Inventor： Yuta Ashida , Noriyuki Hirabayashi , Shigemitsu Tomaki
Abstract: A multilayered filter device includes a multilayer stack, a band pass filter, a first band elimination filter, and a second band elimination filter. The band pass filter and the first and second band elimination filters are each constructed using the multilayer stack. The band pass filter includes a plurality of first resonators with open ends. Each band elimination filter includes a connection path, and a second resonator coupled to the connection path. The connection path includes an impedance transformer. The second resonator includes a conductor line constituting a distributed constant line.
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公开(公告)号：US10950917B2
公开(公告)日：2021-03-16
申请号：US16351609
申请日：2019-03-13
Applicant: TDK CORPORATION
Inventor： Yuta Ashida , Noriyuki Hirabayashi , Shigemitsu Tomaki
Abstract: A dielectric filter includes a plurality of dielectric resonators. The dielectric filter further includes a plurality of resonator bodies corresponding to the plurality of dielectric resonators, and a peripheral dielectric portion lying around the plurality of resonator bodies. Each of the plurality of resonator bodies is formed of a first dielectric having a first relative permittivity. The peripheral dielectric portion is formed of a second dielectric having a second relative permittivity lower than the first relative permittivity. Each of the plurality of resonator bodies includes a plurality of individual elements separated from each other.
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公开(公告)号：US10381700B2
公开(公告)日：2019-08-13
申请号：US15620053
申请日：2017-06-12
Applicant: TDK CORPORATION
Inventor： Yuta Ashida , Kazunari Kimura , Shigemitsu Tomaki
Abstract: A dielectric filter includes: a resonator body formed of dielectric material; surrounding dielectric portion present around the resonator body and formed of dielectric material having a relative permittivity lower than the dielectric material used to form the resonator body; and an input/output conductor portion formed of a conductor and configured to perform at least one supply of an electromagnetic wave to the resonator body and reception of an electromagnetic wave from the resonator body. The resonator body has a first end face and a second end face located at opposite ends in a first direction. The input/output conductor portion is located either at least part of the input/output conductor portion is contained in a space formed by shifting a virtual plane corresponding to the first end face in the first direction away from the second end face, or the input/output conductor portion is in contact with the space.
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Patent Agency Ranking
公开(公告)号：US12218396B2
公开(公告)日：2025-02-04
申请号：US17979884
申请日：2022-11-03
Applicant: TDK CORPORATION
Inventor： Longfei Yi , Shigemitsu Tomaki
Abstract: A filter includes first and second resonators and first and second stub resonators. Each of the first and second resonators includes a first conductor part and a second conductor part electrically connected to the first conductor part and having an impedance smaller than an impedance of the first conductor part. The first stub resonator is electrically connected to the first conductor part of the first resonator. The second stub resonator is electrically connected to the first conductor part of the second resonator. The shape of the first stub resonator and the shape of the second stub resonator are different from each other.
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公开(公告)号：US11664778B2
公开(公告)日：2023-05-30
申请号：US17902256
申请日：2022-09-02
Applicant: TDK CORPORATION
Inventor： Shuhei Sawaguchi , Yuta Ashida , Masahiro Tatematsu , Yoshinori Matsumaru , Shigemitsu Tomaki
CPC classification number: H03H7/42 , H03H7/0115 , H03H7/0161 , H03H7/09 , H03H2001/0085
Abstract: A band-pass filter includes an unbalanced port, a first balanced port, a second balanced port, and first to third resonators provided between the unbalanced port and the first and second balanced ports. The second resonator and the third resonator each are a resonator with both ends open. The second resonator and the third resonator are adjacent to each other in a circuit configuration, and electromagnetically coupled by magnetic coupling as main coupling. The first resonator is provided closer to the second resonator than to the third resonator, and jump-coupled to the third resonator.
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公开(公告)号：US10784551B2
公开(公告)日：2020-09-22
申请号：US16179059
申请日：2018-11-02
Applicant: TDK CORPORATION
Inventor： Yuta Ashida , Noriyuki Hirabayashi , Shigemitsu Tomaki
Abstract: A band-pass filter includes a main body, five resonators, a shield, and a partition. The main body is formed of a dielectric. The partition is formed of a conductor. The five resonators are configured so that capacitive coupling is established between every two of the resonators adjacent to each other in circuit configuration. Each of the five resonators includes a resonator conductor portion. A first stage resonator and a fifth stage resonator are magnetically coupled to each other although not adjacent to each other in circuit configuration. The partition extends to pass between the respective resonator conductor portions of the first stage resonator and the fifth stage resonator, and is electrically connected to the shield.
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公开(公告)号：US10749234B2
公开(公告)日：2020-08-18
申请号：US16179418
申请日：2018-11-02
Applicant: TDK CORPORATION
Inventor： Yuta Ashida , Noriyuki Hirabayashi , Shigemitsu Tomaki
Abstract: A band-pass filter includes five resonators. The five resonators are configured so that capacitive coupling is established between every two of the resonators adjacent to each other in circuit configuration. The first stage resonator and the fifth stage resonator are magnetically coupled to each other. The second stage resonator and the fourth stage resonator are capacitively coupled to each other. Each of the five resonators includes a resonator conductor portion. The respective resonator conductor portions of the first and fifth stage resonators are physically adjacent to each other. The respective resonator conductor portions of the second and fourth stage resonators are physically adjacent to each other. The respective resonator conductor portions of the first and second stage resonators are physically adjacent to each other. The respective resonator conductor portions of the fourth and fifth stage resonators are physically adjacent to each other.
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公开(公告)号：US09698464B2
公开(公告)日：2017-07-04
申请号：US14789261
申请日：2015-07-01
Applicant: TDK CORPORATION
Inventor： Takashi Fukui , Kiyoshi Hatanaka , Toshio Sakurai , Shigemitsu Tomaki
CPC classification number: H01P7/10
Abstract: A transmission line is provided with a line portion with a first relative permittivity which is composed of a first dielectric and a conductor filler dispersed in the first dielectric, and a surrounding dielectric portion composed of a second dielectric with a second relative permittivity, wherein, the surrounding dielectric portion exists around the line portion in a cross section perpendicular to a direction in which electromagnetic waves transmit in the line portion, the first relative permittivity is 600 or more, and the second relative permittivity is smaller than the first relative permittivity. An electronic component has the transmission line. Further, an electronic component is provided with a resonator having a resonant frequency ranging from 1 GHz to 10 GHz, wherein, the resonator is formed by using the transmission line.
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