Simulation investigation of Ku-band relativistic magnetron with all-cavity-axial-extraction
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摘要: 为了拓展相对论磁控管工作频段，设计了一个Ku波段高效率全腔提取相对论磁控管。该器件采用20腔阳极结构，冷腔模拟结果表明其π模工作频率约为13.5 GHz。结合全腔轴向提取技术，在电压150 kV、电流0.41 kA、工作磁场0.4 T的条件下，PIC仿真得到38 MW的仿真功率，工作频率13.47 GHz；仿真得到的功率转换效率约61.6%。仿真结果表明该器件转换效率高，结构紧凑，具有实现轻小型永磁包装的潜质。Abstract: A Ku-band relativistic magnetron (RM) is designed in this paper to broaden working frequency range of this type of HPM source. An anode structure with 20 cavities is applied in this tube and the high frequency simulation results reveals that its π mode frequency is about 13.5 GHz. A Particle- in-Cell (PIC) simulation has been carried out with the all-cavity-axial-extraction (ACAE) structure. The high power microwave with power of 38 MW was detected at 13.47 GHz with power conversion efficiency of about 61.6% when the applied voltage was 150 kV, the current was 0.41 kA, and the inducing magnetic field was about 0.4 T. The simulation results reveal that the presented tube has a high conversion efficiency and a compact structure which brings a potential of light weight package with permanent magnet.
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Key words:
- high power microwave /
- relativistic magnetron /
- all-cavity-axial-extraction /
- Ku-band /
- light weighted
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图 1 Ku波段相对论磁控管工作曲线
Figure 1. B-H condition curve and Hull cutoff curve for Ku-band relativistic magnetron (RM)
表 1 Ku波段相对论磁控管主要结构参数
Table 1. Brief dimension parameters of Ku-band RM
Rc/mm Ra/mm Rcav/mm Lc/mm La/mm Av/(°) As/(°) Rs/mm 8 13 14.5 15 15 11 11 18.5 
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