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Broadband permeability measurement method for ferrites at any magnetization state: Experimental results

Alexis Chevalier 1 July Cortes 1 Jorge Lezaca 1 Patrick Queffelec 2
1 Lab-STICC_UBO_MOM_MF
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance, UBO - Université de Brest
Abstract : This paper describes the experimental results obtained by a broadband permeability measurement method based on the full-wave electromagnetic (EM) analysis of a non-reciprocal transmission line. The method offers a new experimental tool for measuring the broadband dynamic behavior of ferrites whatever their magnetization state. The methodology and experimental setup are presented with the aim of extracting both the permittivity and the two components (diagonal µ and off-diagonal k) of the permeability tensor. Experimental data on commercial ferrites set in different magnetization states are presented and discussed. Furthermore, this method opens perspectives for the determination of other useful magnetic parameters such as resonance linewidth DH. This quantity can be then measured at different frequencies, where conventional resonant methods give a value at a fixed frequency.
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Alexis Chevalier, July Cortes, Jorge Lezaca, Patrick Queffelec. Broadband permeability measurement method for ferrites at any magnetization state: Experimental results. Journal of Applied Physics, American Institute of Physics, 2013, Vol. 114 (174904), pp.174904-1-6. ⟨10.1063/1.4828876⟩. ⟨hal-00951692⟩

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