Multiscale modelling of electromagnetic fields in avionics boxes and metal braids

This paper describes the multiscale approach to calculate electromagnetic fields inside avionics boxes due to penetration of fields through connected metal braids. The modeling involves several length scales: the wavelength of the exterior electromagnetic field, the diameter of the metal braid, and the diameter of the wires in the carriers of the braid. The multiscale approach is used to calculate the induced voltage at the interfaces of avionics boxes and to calculate the electromagnetic fields inside the boxes.