Determination of Complex Permittivity and Permeability of Ferrimagnetic Nanopowders at Microwaves

A technique of determination of complex permittivity and permeability of ferrimagnetic nanopowders using S-parameter measurements in rectangular waveguide and results of its study are presented in this paper. The permittivity and permeability of the ferrimagnetic nanopowders are determined by the novel technique in which magnitudes of S-parameters are used only. Use of the technique allows to simplify experimental measurements for determination of complex permittivity and permeability of the materials and to replace expensive vector network analyzers (VNA) with simple scalar network analyzers (SNA). Index Terms complex permittivity and permeability, ferrimagnetic nanopowders, Sparameters.