Theoretical and Experimental Comparison of Different Lumped Circuit Methods for Determination of Mn–Zn Ferrites´ Intrinsic Complex Permeability and Permittivity

Limitations of the published lumped circuit methods for determination of the Mn-Zn ferrites´ intrinsic complex permeability and permittivity are revealed by careful theoretical examination of their models used to calculate the impedances of the ferrite core inductor and the ferrite core capacitor. To eliminate those limitations, a method without dimensional assumptions on the measurement sample is presented. Theoretical and experimental comparison of the new method and the published methods shows that the new method has higher accuracy while maintaining high computational efficiency.