PT Unknown
AU 0kunev, 0
   Dzardanov, A
   Ekstrom, H
   Jacobsson, S
   Kollberg, E
   Gol'tsman, G
   Gershenzon, E
TI NbN hot electron waveguide mixer for 100 GHz operation
SE Proc. 5[super:th] Int. Symp. Space Terahertz Technol.
PY 1994
BP 214
EP 224
DE waveguide NbN HEB mixers
AB NbN is a promising superconducting material used to develope hot- electron superconducting mixers with an IF bandwidth over 1 GHz. In the 100 GHz frequency range, the following parameters were obtained for NbN films 50 A thick: the noise temperature of the receiver (DSB) 1000 K; the conversion losses 10 d13, the IF bandwidth 1 GHz; the local oscillator power 1 /LW. An increase of NbN film thickness up to 80-100 A and increase of working temperature up to 7-8 K, and a better mixer matching may allow to broader the IF band up to 3 Gllz, to reduce the conversion losses down to 3-5 dB and the noise tempera- ture down to 200-300 K.
ER