Patent ID: 8482366
Filing Date: 2013-07-09
Classification: H03H

Abstract:
1. A laminated balance filter comprising: a plurality of dielectric layers; a plurality of electrode layers; a plurality of longitudinal conducting electrodes penetrating the plurality of dielectric layers in thickness directions thereof; one unbalanced terminal; two balanced terminals; and a ground terminal; wherein a ground electrode, a balanced side inductor, an unbalanced side inductor, and an unbalanced side capacitor electrode are defined by the plurality of electrode layers and the plurality of longitudinal conducting electrodes; the ground electrode is conductively connected to the ground terminal; a first end portion of the unbalanced side inductor is conductively connected to the unbalanced terminal, and a second end portion of the unbalanced side inductor is conductively connected to the ground electrode; the unbalanced side capacitor electrode is arranged at a location opposite to the ground electrode, and is conductively connected to the unbalanced terminal; the balanced side inductor is defined by a series circuit in which an odd number of inductors, including at least three inductors, are connected in series, and a first end portion and a second end portion of the inductor series circuit are conductively connected to the two balanced terminals, respectively; and a center inductor of the odd number of inductors is arranged at a location at which the center inductor is electromagnetic-field-coupled to the unbalanced side inductor, and the odd number of inductors include substantially helical-shaped coils having the same winding directions.