Damping of common mode currents using dissipative resonant cavities

Attenuation of common mode currents is of great relevance for all electronic components and systems, since these currents often give rise to unintended and undesired radiation. Here, usage of common mode chokes and ferrite cores is well established. In this work a novel damping method is described. By using dissipative resonant cavities a relatively high attenuation can be obtained in a more or less small bandwidth. Based on simulations, the impact of most relevant design parameters is investigated. Particularly, an optimized layout and placement of damping resonators is derived. In some use cases the proposed resonators potentially show advantages compared to established methods.