Accurate modeling of ferrite-core effects in probes for Bulk Current Injection

This paper deals with circuit and electromagnetic modeling of injection probes for bulk current injection in the SPICE and CST Microwave Studio environments. Different modeling strategies are used to accurately model frequency-dependent phenomena associated with the probe ferrite core. To this end, the proposed procedure resorts to a preliminary measurement of the probe input impedance, and to Debye and Lorentian models for representing the intrinsic and effective complex permeability spectra required for electromagnetic and circuit modeling, respectively.