INFLUENCE OF YBACUO JOSEPHSON JUNCTION PARAMETERS ON THE CHARACTERISTICS OF BROADBAND DETECTION

For Josephson bicrystal YBaCuO junctions 3–1.5 µm in size, the response to an external signal with a frequency of 165 GHz was measured. Receivers similar ICRN values at helium temperatures and different RN were chosen for study. The amplitudes Shapiro steps measured various powers sample temperatures. dependence output voltage noise on operating point, temperature, power It is shown that fluctuations critical current have greatest influence receiver. volt-watt responsivity noise-equivalent evaluated signal. experimental results are compared numerical calculations based model resistive-capacitive shunted junction. Optimal temperature ranges use each structure shown.