A mixed-mode TRL algorithm based on symmetrical reflection standards

A mixed-mode TRL calibration algorithm based on symmetrical reflection standards is proposed for differential devices measurements. According to the passive fixturepsilas generalized reciprocity and the phase relationship between its common-mode and differential-mode transmission parameters, the sign ambiguity is removed and the fixturespsila generalized transfer matrices are obtained for both homogeneous and inhomogeneous transmission lines. To verify the proposed algorithm, it is applied to de-embed the DUTspsila mixed-mode s parameters from measurement data, and the experimental results are compared with that from full wave simulation. The agreement of the data obtained through both approaches indicates that the proposed technique is valid to calibrate linear differential devices.