PT Unknown
AU Ryabchun, S
   Tong, CE
   Blundell, R
   Kimberk, R
   Gol’tsman, G
TI Stabilisation of a terahertz hot-electron bolometer mixer with microwave feedback control
SE Proc. 18[super:th] Int. Symp. Space Terahertz Technol.
PY 2007
BP 193
EP 198
DE waveguide NbN HEB mixers; Allan variance; stability
AB We report on implementation of microwave feedback control loop to stabilise the performance of an HEB mixer receiver. It is shown that the receiver sensitivity increases by a factor of 4 over a 16-minute scan, and the corresponding Allan time increases up to 10 seconds, as opposed to an open loop value of 1 second. Our experiments also demonstrate that the receiver sensitivity is limited by the intermediate frequency chain.
ER