Title :
Detection of 110 GHz millimeter-wave signal using DyBaCuO step-edge junction
Author :
Fukumoto, Y. ; Shigaki, I. ; Kajikawa, H. ; Ogawa, R. ; Kawate, Y.
Author_Institution :
Kobe Steel Ltd., Hyogo, Japan
fDate :
3/1/1993 12:00:00 AM
Abstract :
Millimeter-wave detection was investigated using a step-edge microbridge Josephson junction (SEJJ) fabricated by a sputter-deposited DyBaCuO thin film. The SEJJ exhibited a clear response to 110-GHz millimeter-wave irradiation, and Shapiro steps could be observed up to the seventh step. Harmonic mixing detection was successfully achieved using microwaves of 6 approximately 22 GHz as a local oscillation signal. The dependence of conversion efficiency ( eta ) on the harmonic number was expressed as eta varies as N/sup -3.3/. The detector was operative at temperatures up to 65 K, although the efficiency rapidly decreased above 50 K.<>
Keywords :
Josephson effect; barium compounds; dysprosium compounds; high-temperature superconductors; microwave detectors; mixers (circuits); receivers; superconducting junction devices; superconducting microwave devices; 110 GHz; DyBaCuO thin film; HTSC; Shapiro steps; conversion efficiency; harmonic number; millimetre wave detection; step-edge microbridge Josephson junction; Detectors; Frequency; Josephson junctions; Millimeter wave technology; Substrates; Superconducting device noise; Superconducting films; Superconducting microwave devices; Temperature sensors; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
