A SPICE MODEL FOR NEAR-FIELD TRANSIENT ANALYSIS OF FERROMAGNETIC GRIDS

Ferromagnetic grids are becoming more and more popular for electromagn etic shielding applications in avionics, satellite design, and power e lectronic systems. This paper presents an equivalent homogeneous but a nisotropic model of a planar ferromagnetic grid. The nonlinear charact eristic and the hysteresis of the material are taken into account. The held source is a low frequency magnetic dipole placed in the proximit y of the grid, Both grid and source models are given in the form of mu lticonductor transmission line (TL) equations, They are solved, in the time domain, by the circuit simulator SPICE.