No abstract

In this study, we propose a methodology to achieve consistency between EM simulation and measurement results by implementing a BCI-monitoring probe system as an EM model. To accurately model the BCI monitoring probe system using EM, it is necessary to accurately calculate the magnetic permeability μ r '(ω) and μ r ''(ω), which change according to the frequency of the ferrite constituting the core of the probe. The impedance measured by the BCI and monitoring probe includes the connector impedance and the capacitance component owing to the coil shape of the probe. In this study, a method of extracting the relative permeability of the ferrite core using only the R-L parallel circuit components excluding these components suggests that the EM analysis model was constructed using the magnetic permeability obtained in this way, and the consistency of the reflection characteristics and transmission characteristics of each probe was confirmed. Finally, the EM model of the BCI-monitoring probe system was built to simulate the S-parameters. The average error with the response characteristics of the measured S-parameters was approximately 1.12 dB, and the effectiveness of the permeability extraction method and the entire EM model were confirmed.