For ferrite beads used in the design of complex electromagnetic environment protection problems

we researched the saturation characteristics of ferrite beads under the conducted current of electromagnetic pulse.On the basis of the measurement of magnetization curves in voltammetry and fitted the magnetization curve by using magnetic Langevin function

we obtained the magnetic saturation current under different pulse widths of electromagnetic pulse conduction current

the thicknesses

the cross-sectional areas

the ratios of the diameter and the material types of the ferrite.The experimental results show that the pulse width of the nanosecond pulse current through the ferrite bead has hardly influence on the saturation characteristics.The saturation current is proportional to the cross-sectional area of the ferrite bead

while the thickness and the ratio of the diameter of the ferrite beads have hardly relationship with the saturation characteristics.The bigger the initial magnetic permeability of the ferrite bead is

the smaller the saturation current and its growth along with the cross-section area are.