| Autor: |
Yilmaz, Ugur, Razmkhah, Sasan, Collot, Romain, Kunert, Juergen, Stolz, Ronny, Febvre, Pascal |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Applied Superconductivity; Oct2020, Vol. 30 Issue 7, p1-5, 5p |
| Abstrakt: |
Bias lines routed over a ground plane naturally form microstrip lines associated with the presence of a capacitance. This can lead to unwanted resonances when coupled to Josephson junctions. This article presents an electrical model of a shunted Josephson junction with its bias lines and pads, fabricated with the 1 kA/cm² rapid single flux quantum niobium process of the FLUXONICS foundry (J. Kunert, 2013), (J. Kunert, 2017). A T-model is used to simulate the microwave behavior of the bias line, predict resonances and design resonance-free superconducting circuits. The I–V characteristics of three shunted Josephson junctions have been obtained from time-domain simulations done with Josephson SIMulator (JSIM) (E. S. Fang and T. Van Duzer, 1989) and show a good match with the experimentally observed resonance at 230 GHz up to the normal resistance branch, measured at 4.2 K. The influence of the position and value of a series resistor placed on bias lines is studied to damp unwanted resonances at the junction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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