High-frequency oscillators using phase-locked arrays of Josephson junctions

• Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control Vol. 42; no. 5; pp. 964 - 966
• Main Authors: Benz, S.P., Booi, P.A.A.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.1995; Institute of Electrical and Electronics Engineers
• Subjects: Acoustic transducers; and frequency control; Applied sciences; Circuits; Electronics; Exact sciences and technology; Ferroelectric materials; ferroelectrics; High temperature superconductors; Josephson junctions; Microwave oscillators; Optical signal processing; Phased arrays; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Superconducting devices; Ultrasonic transducers; Ultrasonics; Shapiro step; Frequency characteristic; Experimental result; Voltage current curve; Josephson junction; Emission; Microwave oscillator; Diode array; Phase locking; Superconductor device; Signal detection; Spectral line width
• ISSN: 0885-3010; 1525-8955
• DOI: 10.1109/58.464849

We present a basic description of Josephson junctions and discuss their use as GHz and THz oscillators. The resistively shunted junction model is used to calculate the available power, linewidth, and operating frequency of the oscillators. We discuss how phase-locked arrays of junctions are used to achieve higher power and narrower linewidth. Two experimental examples of phase-locked emission are shown: one from on-chip detection circuits at 150 GHz and one detected off-chip showing a 13-kHz linewidth at 88.8 GHz.< >