PT Journal
AU Kawamura, J
   Blundell, R
   Tong, CE
   Papa, DC
   Hunter, TR
   Paine, SN
   Patt, F
   Gol'tsman, G
   Cherednichenko, S
   Voronov, B
   Gershenzon, E
TI Superconductive hot-electron-bolometer mixer receiver for 800-GHz operation
SO IEEE Trans. Microw. Theory Techn.
JI IEEE Trans. Microw. Theory Techn.
PY 2000
BP 683
EP 689
VL 48
IS 4
DI 10.1109/22.841960
DE NbN HEB mixers; LO power; local oscillator power; saturation; linearity; dynamic range
AB In this paper, we describe a superconductive hot-electron-bolometer mixer receiver designed to operate in the partially transmissive 350-μm atmospheric window. The receiver employs an NbN thin-film microbridge as the mixer element, in which the main cooling mechanism of the hot electrons is through electron-phonon interaction. At a local-oscillator frequency of 808 GHz, the measured double-sideband receiver noise temperature is TRX=970 K, across a 1-GHz intermediate-frequency bandwidth centered at 1.8 GHz. We have measured the linearity of the receiver and the amount of local-oscillator power incident on the mixer for optimal operation, which is PLO≈1 μW. This receiver was used in making observations as a facility instrument at the Heinrich Hertz Telescope, Mt. Graham, AZ, during the 1998-1999 winter observing season.
ER