公开(公告)号：US10461716B2

公开(公告)日：2019-10-29

申请号：US15956943

申请日：2018-04-19

Applicant: TDK CORPORATION

Inventor： Manabu Kitami ,  Noriyuki Hirabayashi

IPC: H03H7/01 ,  H03H1/00 ,  H01F27/28 ,  H01F27/40 ,  H01F17/00 ,  H01G4/40 ,  H01G4/30

Abstract: A low-pass filter includes first and second input/output ports, first and second LC parallel resonators connected in series and provided between the first and second input/output ports, and first to third paths. The first path includes a first LC series resonator and connects a first end of the first LC parallel resonator closest to the first input/output port to a ground. The second path includes a second LC series resonator and connects a second end of the second LC parallel resonator closest to the second input/output port to the ground. The third path includes a third-path capacitor and connects a connection point between the first and second LC parallel resonators to the ground.

公开(公告)号：US10418963B2

公开(公告)日：2019-09-17

申请号：US15801744

申请日：2017-11-02

Applicant: TDK CORPORATION

Inventor： Manabu Kitami

IPC: H03H7/01 ,  H03H1/00

Abstract: A multilayer filter includes an element body formed by stacking a plurality of insulator layers, and an input terminal, a first output terminal, and a ground terminal arranged on outer surfaces of the element body, a first LC resonance circuit provided in a line connecting the input terminal to the first output terminal and including a first inductor and a first capacitor, and an open inductor having one end connected to the ground terminal and the other end open are provided in the element body, and the open inductor is arranged to face the first output terminal or the first inductor.

公开(公告)号：US09871500B2

公开(公告)日：2018-01-16

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 ,  H01P5/10

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.