Filter network system for HF line - has coil on core with materials having high and low resistivity, wound in two parts in opposite directions

摘要

The filter network supplies and collects an HF and a supply current. It includes a capacitance in the series HF arm and an inductance in the shunt arm. The inductance (11) consists of a winding (112, 113) on a magnetic core (110, 111) consisting partly of a magnetic material (111) with a low resistivity, and partly of a magnetic material (110) with a high resistivity. The winding (112, 113) consists of at least two parts. The direction of winding on the two parts is in the opposite sense.