3 GHz wide frequency model of ferrite bead for power/ground noise simulation of high-speed PCB

A reliable electrical model of a ferrite bead used in a real application field is crucially required by EMI field engineers for proper design of power supply and noise isolation. Especially, the model is needed for the power/ground noise simulation of multi-layer PCBs. In this paper a precise high-frequency model of a ferrite bead is reported up to 3 GHz. The proposed model was successfully verified with excellent agreement to experiment in terms of magnitude and phase of S-parameters, and Smith chart.