Soshin Electric Co., Ltd.

Hiroto Motoyama

Yasuhiko Mizutani

Hironobu Kimura

This resonator has a via electrode part that is formed in a dielectric substrate; a plurality of shielding conductors that are formed so as to surround the via electrode part in the dielectric substrate; and a strip line that is connected to the via electrode part in the dielectric substrate and opposed to at least the shielding conductors, wherein a first input/output terminal and a second input/output terminal are connected to one of the shielding conductors to which a short-circuit end of the via electrode part is connected.

Resonator

A first balance electrode unit electrically connected to a pair of balance terminals (a first balance terminal and a second balance terminal) is formed on a main surface of a fourth dielectric layer sandwiched by an upper grounding electrode and a lower grounding electrode in a dielectric substrate. A second balance electrode unit electrically connected to a pair of balance terminals on the main surface of a seventh dielectric layer. An unbalance electrode unit electrically connected to an unbalance terminal is formed on the main surface of a fifth dielectric layer.

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Ibaraki, Japan

Hiroto Motoyama