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

作者

  • 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

关键词:

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

摘要

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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参考

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已出版

2021-07-22

栏目

General Submission