Research on the relationship between basic transmission characteristics and electromagnetic immunity (BCI) of vehicle Ethernet harness

In this paper, various types of Ethernet harness are taken as the research object, and the transmission characteristic parameters of the harness are measured by network analyzer in real time. The corresponding relationship between the standard high current injection method (BCI), BCI injection harness method in complex electromagnetic environment and the characteristic parameters of the harness are studied. The results show that the change of transmission characteristic parameters of different types of wire harness is closely related to its own length. At the same time, the feasibility of standard electromagnetic interference signal, external electromagnetic environment signal and transmission characteristic parameter change of harness itself is verified.