Patent ID: 9397632
Filing Date: 2016-07-19
CPC Classification: H01G,H03H

Claim Text:
1. A filter, comprising: two common electrode layers and two inner electrode layers, wherein the two inner electrode layers are located between the two common electrode layers, and an electrical insulation layer is disposed between any two adjacent electrode layers of the two common electrode layers and the two inner electrode layers; wherein each of the two common electrode layers is connected to at least one grounding electrode; wherein each of the two inner electrode layers is connected to at least one signal electrode, and wherein each of the two inner electrode layers comprises: a main zone and two extended zones that extend outwards along an edge of the main zone, the two extended zones are disposed on two opposite sides or at two opposite corners of the main zone and are symmetric to a center of the main zone; and wherein the two extended zones of one of the two inner electrode layers do not overlap the two extended zones of the other of the two inner electrode layers in a direction perpendicular to a plane where the two inner electrode layers are located.