摘要
该文提出了3种槽加载折叠波导行波管慢波结构:三角形、梯形和燕尾形槽加载折叠波导。分析比较了不同槽形状对慢波结构的色散特性和耦合阻抗的影响。利用粒子模拟的方法对W波段4种槽加载折叠波导行波管的非线性注-波互作用进行了研究;在相同的电子注参数和输入功率的条件下,对输出功率、电子效率和增益等参量进行了比较。在多种槽加载结构中,梯形槽加载折叠波导输出功率(255 W)和增益(37.1 dB)最大,电子效率最高(10.7%);燕尾形槽加载折叠波导达到饱和所需要的互作用电路最短(64.2 mm);三角形槽加载折叠波导的3 dB带宽最宽。
Three novel groove-loaded Folded Waveguide Slow-Wave Structures （FWSWS）,which include triangle groove-loaded, trapezoid groove-loaded and swallow-tailed groove-loaded FWSWS, are analyzed for the purpose of improving beam-wave interaction. The high-frequency characteristics, including dispersion properties and interaction impedance, are investigated by numerical simulation, and the nonlinear large-signal performances of these Traveling Wave Tubes （TWTs）, including output power, gain and electron efficiency, are also analyzed and corapared by a 3-D particle-in-cell code MAGIC3D. Within the same beam parameters and input power, it is concluded from the comparison that： among these FWSWSs, the trapezoid groove-loaded FWSWS has the highest output power （255 W）, saturated gain （37.1 dB）, and electron efficiency （10.7%）; The swallow-tailed groove-loaded FWSWS owns the shortest circuit length to obtain the saturated gain of which is 64.2 mm; the triangle groove-loaded FWSWS has the widest bandwidth.
出处
《电子与信息学报》
EI
CSCD
北大核心
2012年第7期1760-1766,共7页
Journal of Electronics & Information Technology
关键词
行波管
槽加载折叠波导
高频特性
注-波互作用
粒子模拟
Traveling Wave Tube （TWT）
Groove-loaded folded waveguide
High frequency characteristics
Beam-wave interaction： Particle-in-cell simulation
