Title :
Quasi-optical Josephson-junction oscillator arrays
Author :
Stern, J.A. ; LeDuc, H.G. ; Zmuidzinas, J.
Author_Institution :
Jet Propulsion Lab., Pasadena, CA, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
Josephson junctions are natural voltage-controlled oscillators capable of generating submillimeter-wave-length radiation, but a single junction usually can produce only 100 nW of power and often has a broad spectral linewidth. The authors are investigating 2-D quasi-optical power combining arrays of 10/sup 3/ and 10/sup 4/ NbN/MgO/NbN and Nb/Al-AlO/sub x//Nb junctions to overcome these limitations. The junctions are DC biased in parallel and are distributed along interdigitated lines. The arrays couple to a resonant mode of a Fabry-Perot cavity to achieve mutual phase-locking. The array configuration has a relatively low impedance, which should allow the capacitance of the junctions to be tuned out at the oscillation frequency.<>
Keywords :
Josephson effect; microwave oscillators; submillimetre wave devices; superconducting integrated circuits; superconducting junction devices; superconducting microwave devices; variable-frequency oscillators; 2D quasioptical arrays; Fabry-Perot cavity; Josephson-junction oscillator arrays; Nb-Al-AlO/sub x/-Nb; NbN-MgO-NbN; VCO; VFO; interdigitated lines; mutual phase-locking; power combining arrays; resonant mode; submillimeter-wave-length radiation; voltage-controlled oscillators; Capacitance; Fabry-Perot; Impedance; Josephson junctions; Mutual coupling; Niobium; Phased arrays; Power generation; Resonance; Voltage-controlled oscillators;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
