EMC Investigations on Ethernet Link for Avionic Application

This paper presents part of an Airbus research study on the possibility to integrate in near future high speed communications onboard such as 100BaseT1, a 100Mb/s physical layer, quite well known in automotive industry. Significant improvements could be achieved with such technology: easier system installation, weight and cost savings, … But as environmental conditions are quite different in aeronautics, a deep study has been launched to assess the performances of this new physical layer and especially regarding electromagnetic environment. A focus is given here for conducted emissions, conducted immunity and crosstalk. Many combinations of lengths, transceivers and lighting protections were assessed during measurements. For the alien crosstalk, a simulation analysis is presented.