EMC Simulation of a Power Filter in the Automotive Area

The PoC (Power over Coax) approach is increasing in popularity because of the high speed and sophistication of interfaces in cars, thus allowing the superimposing of signals and power in one coaxial cable. A filter of this type is used on the circuit side to separate the signal and the power supply currents. This paper addresses the aforementioned promising topic, by studying in a 3D Simulation a PoC Filter EMC performance. The contribution is demonstrated by the step-by-step guidance on how to tackle EMC environment of a PoC Filter (this topic has not been addressed in the literature so far). The novelty sterns from calculating return loss and insertion loss for this type of filters and from comparisons that are made between 3D and Schematic simulations (using CST PCB Studio and CST Microwave Studio).