TDR probes in frequency domain in lossy cases: Preliminary results

In this contribution we deal with the problem of measuring both the complex equivalent dielectric permittivity and the complex equivalent magnetic permeability of a lossy material with a TDR probe. Preliminary simulations based on the only the TEM propagation mode show that it is possible to identify these quantities from measurements of reflection coefficients in frequency domain, possibly and hopefully joined to some measurements in time domain with regard to the return trip time of a pulse along the rods of the probe.