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.
| Original language | English |
|---|---|
| Pages (from-to) | 3078-3080 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 69 |
| Issue number | 20 |
| DOIs | |
| State | Published - 11 Nov 1996 |
| Externally published | Yes |