Title :
Enhancing Frequency-Tuning Ability of an Improved Relativistic Backward-Wave Oscillator
Author :
Song, Wei ; Zhang, Xiaowei ; Chen, Changhua ; Sun, Jun ; Song, Zhimin
Author_Institution :
Sci. & Technol. on High Power Microwave Lab., Northwest Inst. of Nucl. Technol., Xi´´an, China
Abstract :
Frequency agility is necessary for many applications of high-power microwave sources. To expand the frequency-tuning bandwidth of the backward-wave oscillator (BWO) with an extracting cavity while holding high efficiency and less amplitude fluctuation, a dual-mechanical tuning method by changing the drift length and the cavity length in synchronism is investigated in this paper. A bandwidth of about 750 MHz around 9.6 GHz with power efficiency of over 33% and amplitude fluctuation of about -1 dB is obtained. The total adjusted length is 24 mm. The simulation results demonstrated the frequency-tuning ability of the relativistic BWO with multigigawatt output power.
Keywords :
backward wave oscillators; circuit tuning; fluctuations; microwave oscillators; amplitude fluctuation; cavity length; drift length; dual-mechanical tuning; extracting cavity; frequency agility; frequency-tuning ability; high-power microwave sources; multigigawatt output power; relativistic backward-wave oscillator; Cavity resonators; Microwave oscillators; Microwave theory and techniques; Plasmas; Resonant frequency; Tuning; Backward-wave oscillator (BWO); frequency tuning; high-power microwave (HPM);
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2012.2230400
