Design of integrated circuits with the SIS junctions in 93/94

• 230 GHz. After the first experiments with partial improvement of the integrated circuit in 1991-1992 a completely new circuit was prepared for single sideband operation in the 205 - 245 GHz band with 4 GHz IF.

• 150 GHz. A new Nb circuit, with inductively tuned SIS junctions, was prepared for the 130-180 GHz band. It is optimized for the fixed-tuned operation of an SIS mixer.