Patent ID: 8872602
Filing Date: 2014-10-28
Classification: H03H

Abstract:
1. A filter module comprising: a mount board that includes a mount electrode layer, an internal electrode layer, a terminal electrode layer, and at least one dielectric layer, and the mount electrode layer, the internal electrode layer, the terminal electrode layer, and the dielectric layer are stacked on each other such that the mount electrode layer is located on a topmost side and the terminal electrode layer is located on a bottommost side; and at least one filter component that is mounted on a front surface of the mount board and that includes first and second balanced terminals; wherein the mount electrode layer includes a first balanced mount electrode, which is connected to the first balanced terminal, and a second balanced mount electrode, which is connected to the second balanced terminal; the internal electrode layer includes a first internal ground electrode; the first internal ground electrode is opposed to each of the first balanced mount electrode and the second mount electrode in a direction in which the mount electrode layer, the internal electrode layer, the terminal electrode layer, and the dielectric layer are stacked; the terminal electrode layer includes a first balanced terminal electrode, which is connected to the first balanced mount electrode, and a second balanced terminal electrode, which is connected to the second balanced mount electrode; a length of a signal path between the first balanced mount electrode and the first balanced terminal electrode is different from a length of a signal path between the second balanced mount electrode and the second balanced terminal electrode; and when viewing the mount board from a side on which the filter component is mounted, an area along which the first balanced mount electrode and the first internal ground electrode oppose each other is different from an area along which the second balanced mount electrode and the first internal ground electrode oppose each other.