Patent ID: 6437665
Filing Date: 2002-08-20
Classification: H03H

Abstract:
A laminated LC filter, comprising:a laminated body including a plurality of insulation layers, a plurality of inductor patterns, and a plurality of capacitor patterns stacked in a stacking direction; and a plurality of LC resonators including a plurality of inductors defined by said inductor patterns, and a plurality of capacitors defined by said capacitor patterns, said capacitor patterns being arranged opposite to said inductor patterns at an inner portion of said laminated body; wherein said inductor of each of the plurality of LC resonators has a multiplex structure including a laminated body having at least two of said inductor patterns and said insulation layers, and a coupling capacitor pattern arranged between the inductor patterns of said inductors in the stacking direction to capacitive-couple said LC resonators; input/output capacitor patterns defining an input connection and an output connection are laminated between the inductor patterns of said inductors; said input/output capacitor patterns defining an input connection and an output connection are arranged on the same insulation layer on which said coupling capacitor pattern is provided; and ends of said plurality of inductor patterns are exposed at the same edge of a respective insulating layer.