Quantum limited balanced superconducting 380-520 GHz mixe...
Westig, Marc Peter
Heterodyne detection techniques using superconducting mixers are of great importance in radio-astronomical receivers due to their high sensitivity and their potential to achieve a high spectral-resolution in the order of one million. Present superconducting niobium mixer technologies potentially can reach the fundamental quantum noise limit up to frequencies of 700 GHz, provided that there is no additional noise contributed by the reference fr...