Title :
Observation of microwave comb generation with a Josephson junction array
Author :
Hohenwarter, G.K.G. ; McGinnis, D.P. ; Beyer, J.B. ; Nordman, J.E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
Abstract :
The authors report high-harmonic-content sideband generation with a Josephson junction array as center conductor of a 50- Omega coplanar line. The line was fed with a low-level microwave signal and an AC bias current with a DC offset. Over 100 harmonics of the AC signal were observed in the mixing spectrum at RF frequencies up to 20 GHz. The shape of the spectrum changed with magnetic field and DC bias point.<>
Keywords :
Josephson effect; harmonic generation; lead; mixers (circuits); niobium; niobium compounds; solid-state microwave circuits; superconducting junction devices; 20 GHz; 50 ohm; AC bias current; DC offset; Josephson junction array; Nb-NbO/sub x/-Pb; RF frequencies; center conductor; coplanar line; high-harmonic-content sideband generation; low-level microwave signal; magnetic field; microwave comb generation; mixers; mixing spectrum; Capacitance; Circuit testing; Conductors; Josephson junctions; Magnetic separation; Microwave antenna arrays; Microwave generation; RF signals; Radio frequency; Tunneling;
Conference_Titel :
Microwave Symposium Digest, 1989., IEEE MTT-S International
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MWSYM.1989.38762
