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 BWO with an extracting cavity while holding a high efficiency and a 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 750MHz around 9.6GHz with power efficiency over 33% and amplitude fluctuation about -1dB is obtained. The total adjusted length is 24mm. the simulation results demonstrated the frequency tuning ability of the relativistic BWO with multi-gigawatt output power.
Keywords :
backward wave oscillators; frequency agility; microwave oscillators; amplitude fluctuation; cavity length; drift length; dual-mechanical tuning method; frequency agility; frequency tuning ability enhancement; frequency tuning bandwidth; high power microwave sources; multigigawatt output power; power efficiency; relativistic BWO; relativistic backward wave oscillator; Cavity resonators; Electron beams; Microwave oscillators; Microwave theory and techniques; Resonant frequency; Tuning; Backward wave oscillator; Frequency tuning; High power microwave;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
