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This article presents a finite element (FE) method (FEM)-based approach for identifying the dimension-independent magnetic and dielectric properties of Mn-Zn toroidal ferrite cores. Two 1-D axisymmetric FE models are used for solving the full-wave electromagnetic field equations in a toroidal ferrite core using either the electric field strength (<inline-formula> <tex-math notation="LaTeX">$\boldsymbol {E}$ </tex-math></inline-formula>) or the magnetic field strength (<inline-formula> <tex-math notation="LaTeX">$\boldsymbol {H}$ </tex-math></inline-formula>) as the variable. Impedance measurements are performed for the toroidal cores over a frequency range of 10 kHz&#x2013;10 MHz. The FE models and the impedance measurements are combined with a non-linear least-squares algorithm for solving the inverse problem for extracting the dimension-independent values of complex permeability and complex permittivity. The extracted permeability is validated against the datasheet of the measured samples.

1-D FEM-Based Approach for Extracting Dimension-Independent Material Properties of Mn-Zn Toroidal Ferrite Cores