On-chip integration of HTS Josephson oscillator and mixer

We report on the experimental realization of a sub-mm wavelength oscillator based on HTS Josephson junctions integrated on-chip with detector Josephso n junction-mixer, Detector and oscillator are coupled via a microstripline, The oscillator is a 2-dimensional (2D) network (array) of 20 HTS step-edge junctions. The array is biased in parallel, i.e. all junctions of the netw ork are oscillating with the same frequency, Effective pumping of the Josep hson mixer was possible up to several hundred GHz. The best results, i.e. s ignificant depression of the critical current and steep Shapiro steps up to the 4(th) order, were obtained between 150 GHz and 200 GHz, Power transfer was detectable up to frequencies around 1.15 THz.