A low-noise series-array Josephson junction parametric amplifier
- 11 November 1996
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 69 (20) , 3078-3080
- https://doi.org/10.1063/1.116845
Abstract
We have obtained parametric gain at 19 GHz from a distributed Josephson junction parametric amplifier whose active gain medium consists of a series array of 1000 Josephson junctions embedded in a coplanar waveguide. When cooled to 1.7 K the amplifier provides 16 dB gain in a mode where the internally generated double sideband noise referred to input is 0.5±0.1 K. This noise is consistent with Nyquist noise generated from the losses. An instantaneous bandwidth of 125 MHz has been observed with a peak gain of 12 dB. The 3 dB compression point with a peak gain of 14.6 dB is -90.5 dB and the dynamic range is 38 dB.Keywords
This publication has 0 references indexed in Scilit: