PT Unknown
AU Kawamura, J
   Blundell, R
   Tong, CE
   Gol'tsman, G
   Gershenzon, E
   Voronov, B
   Cherednichenko, S
TI Phonon-cooled NbN HEB mixers for submillimeter wavelengths
SE Proc. 8[super:th] Int. Symp. Space Terahertz Technol.
PY 1997
BP 23
EP 28
DE waveguide NbN HEB mixers
AB The noise performance of receivers incorporating NbN phonon-cooled superconducting hot electron bolometric mixers is measured from 200 GHz to 900 GHz. The mixer elements are thin-film (thickness — 4 nm) NbN with —5 to 40 pm area fabricated on crystalline quartz sub- strates. The receiver noise temperature from 200 GHz to 900 GHz demonstrates no unexpected degradation with increasing frequency, being roughly TRx ,; 1-2 K The best receiver noise temperatures are 410 K (DSB) at 430 GHz, 483 K at 636 GHz, and 1150 K at 800 GHz.
ER