منابع مشابه
Submillimeter Backward Wave Oscillators
NASA Lewis Research Center is engaged in a program to develop a series of backward wave osci l la tors (BWO's) for the frequency range 500 to 2000 GHz. Generically BWO's are electron beam travel ing wave tubes operating in a dispersive regime in which the group velocity and the phase veloci ty of the induced electromagnetic wave are in opposite direct ions. The osc i l la t ion frequency of a B...
متن کاملStarting oscillation conditions for gyrotron backward wave oscillators
A generalized linear theory that allows for mismatched boundary conditions was used in determining the starting oscillation conditions for gyrotron backward wave oscillators (gyro-BWO). The results reveal that the gyro-BWO interaction is normally caused by the interference between a constant-amplitude backward wave and a decaying backward wave. The latter becomes a forward-growing wave if the o...
متن کاملDevelopment of Backward Wave Oscillators for Terahertz Applications
Calabazas Creek Research, Inc. (CCR) is developing advanced backward wave oscillators (BW0s) operating from 300 GHz to more than 1 THz. The BWOs will be used by the National Aeronautics and Space Administration as local oscillator sources in heterodyne receivers for low-background astronomy observations and remote sensing. Above 100 GHz, only BWOs have broad tunability (over 100 GHz) and high o...
متن کاملDevelopment of Efficient Backward Wave Oscillators for Submillimeter Applications
Calabazas Creek Research, Inc. is funded by the National Aeronautics and Space Administration to develop efficient, light-weight, backward wave oscillators (BWOs) for applications from 300 GHz to 1 THz. These devices are needed as local oscillator (LO) sources in heterodyne receivers. Very low noise heterodyne receivers are needed at submillimeter wavelengths for low-background radioastronomy o...
متن کاملComputer Investigation of Efficiency Enhancement in Coaxial Gyrotron Backward Wave Oscillators
An efficiency enhancement for a gyrotron backward-wave oscillator (gyro-BWO) through local variation of guiding magnetic field by special law is investigated using computer simulation. As result, more number of bunched beam electrons take up position in energy-losing phase for chosen gyro-BWO’s parameters or other gyro-devices. An accelerator device buncher provides analogous effect for acceler...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the IRE
سال: 1955
ISSN: 0096-8390
DOI: 10.1109/jrproc.1955.278054