Investigation of the high-frequency effects in Mn-Zn ferrites and its application to the biomedical sensors

Manganese-Zinc ferrites are utilized in various fields of electrical engineering which include inductors and transformers. Therefore, due to their very important role, careful selection of suitable magnetic materials, and their size and realization is crucial for achieving an optimized magnetic component design. Since the magnetic core’s key material parameters strongly depend on frequency, this thesis’s primary goal is investigating the effects occurring in the magnetic cores when utilized in high-frequency range. Thus, the focus is on analyzing, identifying, and conducting simulations and experimental measurements of these effects encountered in EI planar magnetic cores. Moreover, the focus is also placed on magnetic flux distribution within cores as well as highlighting its dependence on core geometry and realizations. Furthermore, utilization of core’s cross section was discussed and explanation for the displayed behaviour originating mainly from presented permeability change is provided, as well as possible improvements. Lastly, possible application of obtained results in biomedical engineering field is briefly described.