PT Unknown AU Kawamura, J Blundell, R Tong, CE Papa, DC Hunter, TR Paine, StN Patt, F Gol'tsman, G Cherednichenko, S Voronov, B Gershenzon, E TI Superconductive hot-electron bolometer mixer receiver for 800 GHz operation PY 2000 DI 10.1109/22.841960 ER