Ultra Low Noise, Ku-Band Parametric Amplifier Assembly

The role of superconductivity in the space program :

“…al . , 1977) 10 GHz operating frequency 12 MHz bandwidth 24 dB gain _g 10 W pump 1.7 x 10^K maximum output brightness temperature SUPARAMP -80 or 160 series microbridges (Chiao and Parrish, 1976) 33 GHz operating frequency 3.4 GHz bandwidth 15 dB gain 20 ± 10 K SUPARAMP DSB noise temperature 220 K DSB system noise temperature SUPARAMP -Single point contact (Taur and Richards, 1977) 36 GHz operating frequency 50 MHz bandwidth 11 dB gain 50 K noise temperature Cooled (18 K) varactor paramp (Edrich, 1977) 47 GHz operating frequency 300 MHz bandwidth 22 dB gain 100 K system noise temperature 50 K noise contribution from paramp Uncooled varactor paramp (Okean, DeGruyl and Ng, 1976) There are several conclusions to be drawn from a study of Fig. V-3 Perhaps the best-known superconducting accelerometer (at the moment) is the one developed at Stanford University (Paik, 1976) Another type of accelerometer which has been proposed has been called a flux gradient accelerometer (Hoffman, Douglass, Gram and Lam, 1976 Finally, we shall mention a non-resonant accelerometer which has been called a singleaxis superconducting accelerometer In the late 1960 's a superconducting gravimeter was developed by two groups using essentially the same design (Goodkind andWarburton, 1975 andTuman, 1974 Most of the work on superconducting bearings to date has been on the translatory mode of the bearing, and this by a single group (Worden and Everitt, 1974) , so far as we know.…”