2017/10/31 by Ofer Naaman, Naaman, O., Douglas Ferguson +3 · 1 citation
Engineering · Physics and Astronomy · #Advanced Electrical Measurement Techniques #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Physics of Superconductivity and Magnetism #Quantum Physics (quant-ph) #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.1711.07549
openalex publication_date 2017/10/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present design and simulation of a Josephson parametric amplifier with bandwidth exceeding 1.6 GHz, and with high saturation power approaching -90 dBm at a gain of 22.8 dB. An improvement by a factor of roughly 50 in bandwidth over the state of the art is achieved by using well-established impedance matching techniques. An improvement by a factor of roughly 100 in saturation power over the state of the art is achieved by implementing the Josephson nonlinear element as an array of rf-SQUIDs with a total of 40 junctions. WRSpice simulations of the circuit are in excellent agreement with the calculated gain and saturation characteristics.