Influence of mutual coupling on parasitic capacitance in common mode chokes

In the search for a physics based model for a Common Mode Choke (CMC), the high frequency behavior of a multitude of chokes is studied. The high frequency behavior (above self-resonance) is often regarded as purely capacitive, while actually/obviously it has an inductive origin as well. The goal of this paper is to highlight and characterize this behavior and to warn for a common misconception.