Multilayer filter

摘要

A multilayer filter includes a laminate including a plurality of dielectric layers stacked on each other. Inner layer electrodes and outer terminals are provided in the laminate. First and second balanced-side capacitors connected in series between first and second balanced terminals are defined by the inner layer electrodes. An inner-layer plate electrode not connected to any outer terminals is provided on the first dielectric layer. A first plate electrode connected to the first balanced terminal and a second plate electrode connected to the second balanced terminal are provided on the second dielectric layer in opposing relation to the inner-layer plate electrode. The inner-layer plate electrode and the first plate electrode and the first dielectric layer constitute the first balanced-side capacitor, and the inner-layer plate electrode and the second plate electrode and the first dielectric layer constitute the second balanced-side capacitor.

主权项

1. A multilayer filter comprising:
a laminate including a plurality of dielectric layers stacked on each other; an unbalanced terminal; a first balanced terminal; a second balanced terminal; and a filter circuit; wherein a capacitor is connected between the first balanced terminal and the second balanced terminal; the capacitor includes a first capacitor including, as one of opposed electrodes thereof, a first inner-layer plate electrode electrically connected to a terminal electrode of the first balanced terminal and, as the other of the opposed electrodes of the first capacitor, a first floating electrode not connected to a ground, and a second capacitor including, as one of opposed electrodes thereof, a second inner-layer plate electrode electrically connected to a terminal electrode of the second balanced terminal and, as the other of the opposed electrodes of the second capacitor, a second floating electrode not connected to the ground, the first capacitor and the second capacitor being connected in series; a first electrode group including the first inner-layer plate electrode and the first floating electrode and a second electrode group including the second inner-layer plate electrode and the second floating electrode are located on different ones of the plurality of dielectric layers; and the first electrode group and the second electrode group are arranged to be at least partially overlapped with each other, when looking at the laminate in a stacking direction thereof.