Broadband Permittivity and Permeability Extraction of Ferrite Cores up to the GHz Range via Measurements and Simulations

Authors

  • Christian Reinhold 1 Phoenix Contact Electronics GmbH Dringenauer Str. 30, 31812 Bad Pyrmont, Germany,2 ifak Magdeburg e.V. Werner-Heisenberg-Straße 1, 39106 Magdeburg, Germany
  • Peter Scholz Phoenix Contact Electronics GmbH Dringenauer Str. 30, 31812 Bad Pyrmont, Germany
  • Ulrich Jumar ifak Magdeburg e.V. Werner-Heisenberg-Straße 1, 39106 Magdeburg, Germany

Keywords:

Broadband model, EM-simulation, ferrites, material characterization, wireless power

Abstract

In this contribution a method is presented which allows for the characterization of the magnetic (mu’-j mu’’) as well as the dielectric (epsilon’-j epsilon’’) properties of ferrites in a broad frequency band (kHz to GHz). In order to determine the material properties at certain frequencies, the simulation model parameters of a particular test setup are tuned via optimization such that the simulated response of a sample to an electromagnetic excitation matches to the measured one. A loop and parallel plate setup support a low frequency parameter extraction of the sample while a coplanar line is used for high frequencies. The extracted material properties are fitted by a broadband causal fit in order to obtain a material model for the whole frequency range. The presented method is verified for a setup with a coil and a ferrite core. The results show that dielectric properties of the ferrite core cannot be neglected for microwave frequencies.

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References

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Published

2021-07-22

How to Cite

Christian Reinhold, Peter Scholz, & Ulrich Jumar. (2021). Broadband Permittivity and Permeability Extraction of Ferrite Cores up to the GHz Range via Measurements and Simulations. The Applied Computational Electromagnetics Society Journal (ACES), 33(07), 810–813. Retrieved from https://journals.riverpublishers.com/index.php/ACES/article/view/9089

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