Permittivity measurement of spherical objects using a reverberation chamber

This paper presents a new permittivity measurement method by using a reverberation chamber (RC). The absorption cross section (ACS) is measured first. By comparing the measured ACS with the analytical value and considering the frequency dependency, both the real part and the imaginary part of the permittivity can then be obtained. Finally, self-explanatory results can be obtained; the limitations of the method are also discussed. This method is most suitable for the permittivity measurement of a spherical solid object or object containing liquid, or powder or porous material.