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Theoretical and experimental determination of the permeability tensor components of magnetized ferrites at microwave frequencies

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4 Author(s)
Mallegol, S. ; Lab. for Electron. & Commun. Syst., Univ. de Bretagne Occidentale, Brest, France ; Queffelec, Patrick ; Le Floc'h, M. ; Gelin, Philippe

We compare the diagonal μ and off-diagonal κ permeability tensor components of magnetized polycrystalline ferrites given by the theoretical model of Gelin and Berthou with experimental ones at microwave frequencies. We used a broad-band and noniterative measurement technique recently developed within our research group. Whatever the ferrite magnetization state is, simulated and measured μ and κ points agree well. This study provides an experimental validation of the Gelin-Berthou model. Moreover, by using this characterization method, we show how the measurement of the magnetic properties can be affected by the size of the ferrite sample under test.

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Magnetics, IEEE Transactions on  (Volume:39 ,  Issue: 4 )