The significance of specific vehicle parts on automotive radiated immunity numerical simulations

This paper highlights the effects of specific parts of a vehicle in a radiated immunity numerical simulation. The benefits of numerical simulations for electromagnetic compatibility analysis is well known and reported in the literature, nevertheless, the accuracy of the results relies on the mathematical models that is being used on the simulations. Several simulations are addressed in this work, showing how specific parts of a vehicle can affect the electric field inside a vehicle. The commercial package ANSYS HFSS™ was used due to the extremely fast and accurate simulations since it relies on the finite element method technique including hybridizations with the method of moments. This allows complete simulations to be run in under a few minutes with controlled convergence, allowing a more extensive investigation. The simulation results are compared with experimental data obtained from real tests performed at Instituto Nacional de Pesquisas Espaciais showing a good agreement.