Free space calibration and S parameters measurement test bench for the dielectric material characterization in Ka, W and D-band

This presentation deals with our experience on free space calibration techniques and measurements at millimeter waves without "Time Domain Gating", in the Ka, W and D bands. Simulated and measured S-parameters for dielectric slabs show the validity of the permittivity extraction method over the frequency bands. This test bench could be also used for metamaterial and non-solid material characterizations.