An X-band phase-locked relativistic backward wave oscillator

作者：Wu, Y.^*; Li, Z. H.; Xu, Z.; Jin, X.; Ma, Q. S.

来源：Physics of Plasmas, 2015, 22(8): 083103.

DOI：10.1063/1.4927781

For the purpose of coherent high power microwave combining at high frequency band, an X-band phase-locked relativistic backward wave oscillator is presented and investigated. The phase-locking of the oscillator is accomplished by modulation of the electron beam before it reaches the oscillator. To produce a bunched beam with an acceptable injected RF power requirement, an over-moded input cavity is employed to provide initial density modulation. And a buncher cavity is introduced to further increase the modulation depth. When the beam enters the oscillator, the modulation depth is enough to lock the frequency and phase of the output microwave generated by the oscillator. Particle-in-cell simulation shows that an input power of 90kW is sufficient to lock the frequency and phase of 1.5GW output microwave with locking bandwidth of 60MHz.

• 出版日期2015-8
• 单位中国工程物理研究院