Nouvelle méthode de détermination des parties réelles des paramétres électriques et magnétiques des résonateurs à ferrites saturés et non saturés

Measurement of the complex permittivity, initial permeability, permeability tensor and ferromagnetic linewidth of gyromagnetic materials

“…One of the most frequently used resonance structures for measurements of permittivity and permeability tensor components of rod shape samples is the cylindrical TM mn0 mode cavity shown in figure 2(a). The appropriate TDE for this structure was presented by Bussey [24], and its derivation can also be found in [25,26]. Finally, TDEs for the TE n0p modes of a spherical cavity containing spherical gyromagnetic samples and spherical gyromagnetic samples in free space figure 2(f),and in a spherical metal cavity figure 2(e) are presented in [27,28].…”

“…The cylindrical TM nm0 mode cavity containing a cylindrical rod sample, was one of the first fixtures for which a rigorous electrodynamic approach (TDE) was used for determination of permeability tensor components [30]. Later, Muller-Gronau [25] and Le Roux [26] solved real TDE for TM nm0 modes to determine the real parts of the effective permeability tensor components.…”

Comparison of split post dielectric resonator and ferrite disc resonator techniques for microwave permittivity measurements of polycrystalline yttrium iron garnet

“…Several techniques to measure the complex permittivity of low-loss ferrite materials at microwave frequencies have been described. Resonance methods are considered preferable because they offer the highest accuracy in the measurement of dielectric loss [1][2][3][4]. There are two ways to separate the measurement of the dielectric properties of ferrite (permittivity) from the magnetic properties (permeability).…”