An earth electrode pattern is formed on one surface of a plate consisting of a dielectric material. Earth terminal patterns are extended from the earth electrode pattern to the side faces of the plate. Two coil electrode patterns are formed on both sides of the earth electrode pattern with plates between the earth electrode pattern and two coil electrode patterns. Take-out terminal patterns and earth terminal patterns are drawn out from the coil electrode patterns toward end portions of the plate. The take-out terminal pattern and the earth terminal pattern of one coil electrode pattern are disposed at a distance having a predetermined impedance. A connecting window for magnetically connecting two coil electrode patterns is formed in the earth electrode pattern. The earth terminal patterns of the earth electrode pattern and the earth terminal patterns of the coil electrode patterns are connected.
