Patent ID: 7148768

Claim:
A filter element comprising: a coil part formed having a generally tubular shape by layering a generally belt-shape signal transmitting conductor and a generally belt-shape grounding conductor with a generally belt-shape insulator in between and winding so that the belt-shape grounding conductor is outside the belt-shape signal transmitting conductor at an outermost end, a magnetic body being attached to a center of the coil part; an input terminal that is connected to an outermost circumferential part of the belt-shape signal transmitting conductor and is led from an outer circumferential position of the coil part; an output terminal that is connected to an innermost circumferential part of the belt-shape signal transmitting conductor and is led from a central position of the coil part located on an opposite side to a leading position of the input terminal with the magnetic body in between; and a grounding terminal that is connected to an outermost circumferential part of the belt-shape grounding conductor and is led from an outer circumferential position of the coil part located on an opposite side to the leading position of the input terminal with a leading position of the output terminal in between.