摘要
采用半径微扰的光滑壁圆波导产生HE11模,避免了常规微波领域中采用的波纹渐变转换器在高功率微波领域应用时易发生齿间打火的不足。采用基于模式耦合理论的迭代综合方法优化了不规则的半径渐变轮廓,使输出产生组成HE11模的混合模式。并通过全电磁波仿真软件进行了对比,输出波束标量高斯含量在9.1～9.7GHz范围内均高于99.5%,功率容量4.9GW。
High power microwave（HPM） sources usually employ overmoded output waveguide to obtain higher power ca pacity. In designing feeder of beam waveguide and reflect antenna, TE11 mode needs to be convert to HE11 mode to radiate a qua- si Gaussian beam with quite low side lobe. RF breakdown will occur in corrugate gap when traditional corrugated TE11 HE11 mode converter is used in HPM field. In order to solve this problem, a method to design over-moded smooth-wall TE11-HE11 converter was investigated. Using an iterative synthesis method based on coupled-mode theory, a 9.4 GHz, Ф70 mm over moded smooth wall TE11-HE11 converter was designed, and contrast to electro-magnetic simulation result, the scalar Gauss ratio of the output beam is higher than 99.5% from 9.1 GHz to 9.7 GHz, the power capacity is as high as 4.9 GW.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2013年第2期394-398,共5页
High Power Laser and Particle Beams
基金
国家高技术发展计划项目
关键词
高功率微波
准高斯模式
模式耦合理论
迭代综合
模式变换器
high power microwave
quasi-Gauss mode
coupled mode theory
iterative synthesis
mode converter
