PT Unknown
AU Meledin, D
   Tong, CY
   Blundell, R
   Kaurova, N
   Smirnov, K
   Voronov, B
   Gol'tsman, G
TI The sensitivity and IF bandwidth of waveguide NbN hot electron bolometer mixers on MgO buffer layers over crystalline quartz
SE Proc. 13[super:th] Int. Symp. Space Terahertz Technol.
PY 2002
BP 65
EP 72
DE waveguide NbN HEB mixers
AB We have developed and characterized waveguide phonon-cooled NbN Hot Electron Bolometer (FMB) mixers fabricated from a 3-4 nm thick NbN film deposited on a 200nm thick MgO buffer layer over crystalline quartz. Double side band receiver noise temperatures of 900-1050 K at 1.035 THz, and 1300-1400 K at 1.26 THz have been measured at an intermediate frequency of 1.5 GHz. The intermediate frequency bandwidth, measured at 0.8 THz LO frequency, is 3.2 GHz at the optimal bias point for low noise receiver operation.
PI Cambridge, MA, USA
ER