15-Term Self-Calibration without an ideal THRU- or LINE-Standard

New solutions for the self-calibration of a 2-port VNA with a leaky error-model are presented in this paper. These solutions allow the characterization of the measurement setup with 15-term error-networks without an ideal THRU- or LINE-connection. As a consequence of self-calibration, unknown parameters in the calibration standards are allowed. The first procedure named NMRG2 requires the same calibration standards as the well-known TMRG procedure, with the exception of the THRU, which can be replaced by a known network standard. The second self-calibration procedure named MONS5 applies an unknown NETWORK, an asymmetric 2-port reflection and a MATCH, whereas two other known reflection standards are required.