A new coaxial high power microwave source based on dual beams

作者：Li, Yangmei^*; Zhang, Xiaoping; Qi, Zumin; Dang, Fangchao; Qian, Baoliang

来源：Physics of Plasmas, 2014, 21(5): 053302.

DOI：10.1063/1.4881465

We present a new coaxial high power microwave source based on dual beams, which combines a relativistic backward wave oscillator (RBWO) (noted as the inner sub-source below) and a coaxial transit-time oscillator (TTO) (noted as the outer sub-source). The cathode consists of an inner and an outer annular cathode, which provides the inner and the outer annular electron beam for the sub-sources, respectively. Particle-in-cell (PIC) simulation results demonstrate that power conversion efficiencies of the two sub-sources with an identical frequency of 9.74 GHz are 29% and 25%, respectively. It is furthermore found that phase locking between the inner and the outer sub-sources can be realized, which suggests a feasibility to obtain a higher power output if the two microwave signals are coherently combined.

• 出版日期2014-5
• 单位中国人民解放军国防科学技术大学