Title :
Measurement of frequency above 100 GHz with high-Tc Josephson junction array
Author :
Konopka, J. ; Wolff, I. ; Harnack, O. ; Beuven, S. ; Konopka, A.
Author_Institution :
Inst. Phys. PAN, Warsaw Univ., Poland
Abstract :
YBaCuO series arrays composed of 23 bicrystal grain boundary Josephson junctions incorporated into 2-arm logarithmic spiral antenna and coupled to a broadband quasi-optic lens system were applied for determination of frequencies above 100 GHz by comparing the DC voltages aroused over the array under MM-wave irradiation, with a solid-state reference cell. Full phase-lock of all junctions under some 0.1 mW incident power at frequency 146 GHz (presence of 23-fold Shapiro step) was obtained for a YSZ-substrate array at temperatures up to 68 K. We verified the precision of the proposed instrument by measuring time frequency drifts for both the 100 GHz Gunn diode oscillator and the 150 GHz backward-wave oscillator
Keywords :
frequency measurement; high-temperature superconductors; millimetre wave detectors; millimetre wave measurement; superconducting arrays; superconducting junction devices; superconducting microwave devices; 100 to 150 GHz; 68 K; BWO; EHF; Gunn diode oscillator; HTSC; MM-wave frequency measurement; MM-wave irradiation; YBaCuO; YBaCuO series arrays; YSZ-substrate array; backward-wave oscillator; bicrystal grain boundary Josephson junctions; broadband quasi-optic lens system; high-Tc Josephson junction array; logarithmic spiral antenna; solid-state reference cell; time frequency drifts; Antenna arrays; Antenna measurements; Broadband antennas; Frequency measurement; Grain boundaries; Josephson junctions; Oscillators; Phased arrays; Spirals; Yttrium barium copper oxide;
Conference_Titel :
Microwaves and Radar, 1998. MIKON '98., 12th International Conference on
Conference_Location :
Krakow
Print_ISBN :
83-906662-0-0
DOI :
10.1109/MIKON.1998.742802
