Analysis of the anti-interference ability of Ethernet physical layer links based on CST

In response to the actual electromagnetic interference problem of Ethernet cards in high-speed railway operation, the TRDP network card Ethernet driver circuit self-developed in the laboratory is taken as the research object. Based on the CST simulation environment, a physical link model of high-speed EMU Ethernet in the direction of coupler connection is built, and the accuracy of the model is verified by comparing it with measured data. Interference simulation is conducted on the model under power cable interference conditions, and the protective circuit on the card is confirmed to have a suppressive effect on actual extreme interference situations by adding transient pulse group interference