A new tuner-based method for measuring the four noise-parameters of a two-port is proposed. It makes use of a novel measurement ratio that includes noise powers and mismatch factors simultaneously. In contrast to previous works, no restrictions on the noise source, tuner state temperatures and cold temperatures are assumed
Lazaro, A., Pradell, L., O'callaghan, J. Method for measuring noise parameters of microwave two-port. "Electronics Letters", Juny 1998, vol. 34, núm. 13, p. 1332-1333.