PT Unknown
AU Jiang, L
   Zhang, W
   Yao, QJ
   Lin, ZH
   Li, J
   Shi, SC
   Svechnikov, SI
   Vachtomin, YB
   Antipov, SV
   Voronov, BM
   Kaurova, NS
   Gol'tsman, GN
TI Characterization of a quasi-optical NbN superconducting hot-electron bolometer mixer
SE Proc. PIERS
PY 2005
BP 587
EP 590
VL 1
IS 5
DI 10.2529/PIERS041203233704
DE NbN HEB mixers
AB In this paper, we report the performance of a quasi-optical NbN superconducting HEB (hot electron bolome-ter) mixer measured at 500 GHz. The quasi-optical NbN superconducting HEB mixer is cryogenically cooled bya 4-K close-cycled refrigerator. Its receiver noise temperature and conversion gain are thoroughly investigatedfor different LO pumping levels and dc biases. The lowest receiver noise temperature is found to be approxi-mately 1200 K, and reduced to about 445 K after correcting theloss of the measurement system. The stabilityof the mixer’s IF output power is also demonstrated.
ER