公开(公告)号：US20190199323A1

公开(公告)日：2019-06-27

申请号：US16291569

申请日：2019-03-04

Applicant: TDK CORPORATION

Inventor： Kazuhiro TSUKAMOTO ,  Hiroya SUZUKI

IPC: H03H9/70 ,  H03H9/54 ,  H03H7/01 ,  H03H9/72 ,  H03H9/64

CPC classification number: H03H9/542 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1775 ,  H03H9/64 ,  H03H9/703 ,  H03H9/706 ,  H03H9/72 ,  H03H9/725

Abstract: A branching filter includes a first band-pass filter provided between a common port and a first signal port, and a second band-pass filter provided between the common port and a second signal port. The first band-pass filter includes a first LC resonant circuit and a first resonant circuit section. The first resonant circuit section includes a first acoustic wave resonator. The second band-pass filter includes a second LC resonant circuit and a second resonant circuit section. The second resonant circuit section includes a second acoustic wave resonator and an inductor connected in parallel.

公开(公告)号：US20240282497A1

公开(公告)日：2024-08-22

申请号：US18540986

申请日：2023-12-15

Applicant: TDK CORPORATION

Inventor： Takuya SATO ,  Kazuhiro TSUKAMOTO

IPC: H01F17/00

CPC classification number: H01F17/0013

Abstract: An inductor includes a first inductor portion, and a second inductor portion that is connected in parallel with the first inductor portion. Each of the first and second inductor portions includes a conductor structure wound about an axis extending in a direction orthogonal to a stacking direction of a stack. The conductor structure of the first inductor portion includes first to third structures. The first structure includes three columnar conductors. The second structure includes three columnar conductors.

公开(公告)号：US20230074751A1

公开(公告)日：2023-03-09

申请号：US17896464

申请日：2022-08-26

Applicant: TDK CORPORATION

Inventor： Kazuhiro TSUKAMOTO

IPC: H03H7/01

Abstract: An LC circuit includes a first capacitor provided between a first connection point and a second connection point, a second capacitor provided between the second connection point and a third connection point, a third capacitor provided between the third connection point and a fourth connection point, a fourth capacitor provided between the first connection point and the third connection point, a fifth capacitor provided between the second connection point and the fourth connection point, a first inductor connected to the second connection point, and a second inductor connected to the third connection point.

公开(公告)号：US20220294411A1

公开(公告)日：2022-09-15

申请号：US17686186

申请日：2022-03-03

Applicant: TDK CORPORATION

Inventor： Takuya SATO ,  Kazuhiro TSUKAMOTO ,  Masanori TSUTSUMI

IPC: H03H7/01 ,  H03H7/46

Abstract: A branching filter includes a common port, a first signal port, a second signal port, a first filter, which is provided between the common port and the first signal port, that selectively passes a signal of a frequency within a first passband, a second filter, which is provided between the common port and the second signal port, that selectively passes a signal of a frequency within a second passband different from the first passband, and a capacitor that has a first end and a second end and connects the first filter and the second filter.

公开(公告)号：US20230115011A1

公开(公告)日：2023-04-13

申请号：US17961639

申请日：2022-10-07

Applicant: TDK CORPORATION

Inventor： Kazuhiro TSUKAMOTO

IPC: H03H9/54 ,  H03H9/70 ,  H03H9/05 ,  H03H7/01

Abstract: An electronic component includes a first main body including a plurality of dielectric layers stacked together, and a second main body mounted to the first main body. The second main body includes a first circuit section and a second circuit section that are each constituted by using at least one acoustic wave element and are electrically separated from each other. The first main body includes first to third ground conductor lavers located between the first and second circuit sections when seen in a Z direction.

公开(公告)号：US20170222616A1

公开(公告)日：2017-08-03

申请号：US15386413

申请日：2016-12-21

Applicant: TDK CORPORATION

Inventor： Manabu KITAMI ,  Kazuhiro TSUKAMOTO

IPC: H03H7/46 ,  H03H7/01

CPC classification number: H03H7/46 ,  H03H7/0115 ,  H03H7/463

Abstract: A branching filter includes a first filter provided between a common port and a first signal port, and a second filter provided between the common port and a second signal port. The branching filter further includes a connection path and a first capacitor. The connection path includes a first inductor, and connects the common port and the first filter. The first capacitor is provided between the connection path and the ground. The second filter is connected to the connection path. The first capacitor is connected to the first inductor at a first branch point located at any position in the first inductor.

公开(公告)号：US20170179930A1

公开(公告)日：2017-06-22

申请号：US15355445

申请日：2016-11-18

Applicant: TDK CORPORATION

Inventor： Kazuhiro TSUKAMOTO ,  Hiroya SUZUKI

IPC: H03H9/70 ,  H03H9/54 ,  H03H9/72 ,  H03H9/64

CPC classification number: H03H9/542 ,  H03H7/075 ,  H03H7/175 ,  H03H9/64 ,  H03H9/703 ,  H03H9/72

Abstract: A branching filter includes a low-pass filter provided between a common port and a first signal port, and a high-pass filter provided between the common port and a second signal port. The low-pass filter includes: a first LC resonant circuit; and a first acoustic wave resonator provided in a shunt circuit connecting a path leading from the first LC resonant circuit to the first signal port to a ground. The high-pass filter includes: a second LC resonant circuit; and a second acoustic wave resonator provided in a path leading from the second LC resonant circuit to the second signal port.

公开(公告)号：US20160352303A1

公开(公告)日：2016-12-01

申请号：US15082513

申请日：2016-03-28

Applicant: TDK CORPORATION

Inventor： Masanori TSUTSUMI ,  Kazuhiro TSUKAMOTO ,  Manabu KITAMI ,  Toshiyuki TAKAMI ,  Shohei KUSUMOTO ,  Noriyuki HIRABAYASHI

IPC: H03H7/42

CPC classification number: H03H7/42

Abstract: A multilayer electronic component includes a stack and a balun. The stack includes a plurality of stacked dielectric layers and conductor layers. The balun is formed using the stack. The balun includes an unbalanced transmission line and first to fourth balanced transmission lines. The unbalanced transmission line includes a first line portion and a second line portion connected in series. The first and second balanced transmission lines are configured to be electromagnetically coupled to the first line portion. The third and fourth balanced transmission lines are configured to be electromagnetically coupled to the second line portion.

Abstract translation: 多层电子部件包括堆叠和​​平衡 - 不平衡转换器。 堆叠包括多个堆叠的电介质层和导体层。 平衡 - 不平衡变换器使用堆叠形成。 平衡 - 不平衡转换器包括不平衡传输线和第一至第四平衡传输线。 不平衡传输线包括串联连接的第一线部分和第二线部分。 第一和第二平衡传输线被配置为与第一线路部分电磁耦合。 第三和第四平衡传输线被配置为与第二线路部分电磁耦合。

公开(公告)号：US20220294407A1

公开(公告)日：2022-09-15

申请号：US17685442

申请日：2022-03-03

Applicant: TDK CORPORATION

Inventor： Takuya SATO ,  Kazuhiro TSUKAMOTO

IPC: H03H7/01

Abstract: A filter device includes a filter including at least one inductor and at least one capacitor, and a stack of a plurality of dielectric layers and a plurality of conductor layers. The plurality of dielectric layers include at least one first dielectric layer formed of a first dielectric material and at least one second dielectric layer formed of a second dielectric material. The plurality of conductor layers include at least one first conductor layer in contact with the at least one first dielectric layer, and at least one second conductor layer in contact with the at least one second dielectric layer. The temperature coefficient of resonant frequency of the first dielectric material has a positive value. The temperature coefficient of resonant frequency of the second dielectric material has a negative value.

公开(公告)号：US20210257984A1

公开(公告)日：2021-08-19

申请号：US17176607

申请日：2021-02-16

Applicant: TDK CORPORATION

Inventor： Takuya SATO ,  Kazuhiro TSUKAMOTO

IPC: H03H7/01

Abstract: In a multilayer filter, a first LC parallel resonance unit, a second LC parallel resonance unit, and an LC circuit unit are configured in an element body, in which the LC circuit unit is connected between the first LC parallel resonance unit and the second LC parallel resonance unit in a path between a first terminal electrode and a second terminal electrode, a conductor pattern constituting an inductor of the LC circuit unit is not disposed between a conductor pattern constituting a first inductor of the first LC parallel resonance unit and a conductor pattern constituting a second inductor of the second LC parallel resonance unit in the element body, and the first inductor of the first LC parallel resonance unit and the second inductor of the second LC parallel resonance unit are magnetically coupled.