Noise and Conversion Efficiency of High-Tc Superconductor Josephson Mixers Harnack, O. ; Beuven, S. ; Darula, M. ; Kohlstedt, H. ; Tarasov, M. ; Stepantsov, E. ; Ivanov, Z. Abstract Publication: Ninth International Symposium on Space Terahertz Technology Pub Date: March 1998 Bibcode: 1998stt..conf..347H