EMC modeling of avionic equipment at low frequency [10kHz–400MHz]

This article describes an approach developed in the HIRF-SE EU FP7 project in order to model the conducted disturbances at the equipment interface due to Back-Door constraints. This approach is based on the “association” of two modeling tools: CRIPTE for Multi conductor Transmission Line Network resolution, and IMEA for equipment input impedance modeling. Both tools are here demonstrated for the analysis of a Bulk Current Injection test in the 10 kHz–400 MHz frequency range. For equipment manufacturers, the interest of this approach is to be able to analyze the EMC sensitivity and the optimized design of an equipment interface representative of the ones encountered in the now spreading technology of modular avionics.