Two-idler parametric amplification with Josephson junctions
- 1 September 1975
- journal article
- conference paper
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 46 (9) , 4018-4025
- https://doi.org/10.1063/1.322130
Abstract
A self-pumped Josephson junction can be operated in a mode which is described in first order by a two-idler parametric amplifier analysis for a sinusoidal elastance variation. Thus the analysis and operation follows the two-idler negative resistance behavior predicted by Penfield and Rafuse for varactor diodes. Experimental observations on parametric negative conductance excitations at 9 GHz by a Josephson point contact are readily explained by the two-idler model. A total signal power gain of 12 dB was achieved with an experimental device consisting of a niobium titanium point contact in a shallow rectangular cavity coupled through a room-temperature circulator.This publication has 6 references indexed in Scilit:
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- A sinusoidal current-phase relation for superconducting thin-film microbridgesJournal of Low Temperature Physics, 1972
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