Two Novel Sources of Variable Frequency Microwave Energy
نویسندگان
چکیده
Two novel sources of variable frequency microwave energy with increased efficiency are described in this paper: a backward wave oscillator (BWO) with auto modulation of electron emission and a two-section BWO, which second section operates in the traveling wave tube (TWT) mode. In the first case, the BWO output is connected through a section of a slow-wave structure to the control electrode of the gun providing a modulation of the current emitted by the cathode. This leads to a significant increase in the BWO output signal. In the second case, the electron beam, modulated in the first section (BWO section), excites an electromagnetic wave in the second section (TWT section) and interacts with this excited wave converting its DC energy to the RF signal. The results of non-linear analysis and calculations show that in both cases the BWO efficiency can be increased 3-4 times. The analysis of above mentioned BWOs is presented in this paper.
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