Manohara, H.; Bronikowski, M. J.; Hunt, B. D.; Siegel, P. H.
(Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2005., 2005-11)
Traditional submillimeter-wave vacuum tube sources, now available only from the former Soviet Union, have been a mainstay for generating modest amounts (mW) of narrow band (phase lockable) tunable CW RF power at frequencies ...