Tdk Corporation

Manabu Kitami

Noriyuki Hirabayashi

Kazuhiro Tsukamoto

Yasumasa Harihara

Masaki Matsushima

Takeshi Oohashi

Toshiyuki Takami

Naoaki Utagawa

Shohei Kusumoto

Masanori Tsutsumi

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.

Low-pass filter

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.

Multilayer filter

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.

Multilayer electronic component

An antenna device includes an antenna elementand a printed circuit boardon which the antenna elementis mounted. The antenna elementincludes a basewhich is made of a dielectric material and a radiation conductor formed on at least one surface of the base. The printed circuit boardincludes ground clearance regionhaving substantially a rectangular shape and having one side contacting an edge of the printed circuit board and other three sides surrounded by an edge line of a ground pattern, an antenna mounting regionprovided within the ground clearance region, and at least one frequency adjusting elementprovided within the ground clearance region. The frequency adjusting elementis provided on the far side of the antenna mounting regionas viewed from an edgeof the printed circuit board

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Tokyo, Japan

Manabu Kitami