PT Journal
AU Ozhegov, RV
   Okunev, OV
   Gol’tsman, GN
   Filippenko, LV
   Koshelets, VP
TI Noise equivalent temperature difference of a superconducting integrated terahertz receiver
SO J. Commun. Technol. Electron.
JI J. Commun. Technol. Electron.
PY 2009
BP 716
EP 720
VL 54
IS 6
DI 10.1134/S1064226909060151
DE SIS mixer SIR NETD; FFO; harmonic mixer
AB The dependence of the noise equivalent temperature difference (NETD) of a superconducting integrated receiver (SIR) on the receiver noise temperature and the inputsignal level has been investigated. An unprecedented NETD of 13±2 mK has been measured at a SIR noise temperature of 200 K, intermediate-frequency bandwidth of 4 GHz, and time constant of 1 s. With a decrease in the input signal, an improvement in the NETD is observed. This effect is explained by a reduction in the influence of the instabilities of the receiver power supply and the amplification circuit that occur when the input signal is decreased.
ER