Parametric amplification in arrays of Josephson tunnel junctions
- 15 March 1977
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 30 (6), 298-300
- https://doi.org/10.1063/1.89381
Abstract
Arrays of 30 series‐connected unbiased small Josephson tunnel junctions give parametric amplification at 10 GHz. A pump power of 10−8 W was required and gains of up to 24 dB were achieved. The gain was constant for a large range of signal power, up to a signal output power of 10 dB below the pump power. A maximum brightness temperature of 1.7×106 K, in a bandwidth of 12 MHz, was deduced from variations of the gain with input noise level.Keywords
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