Statistical VNA calibration technique using thru and multiple reflect terminations

A novel statistical technique for calibrating vector network analyzer (VNA) with zero-length thru and multiple-reflect terminations is presented. The terminations are assumed to be of the same type, e.g. offset terminations of different lengths with partly unknown characteristics. Their reflection coefficients are modeled over frequency and identified in the calibration together with the VNA error terms. Experiments have verified high accuracy of this new technique.