强激光与粒子束, 2013, 25 (2): 394, 网络出版: 2013-01-07
9.4 GHz过模光滑壁TE11HE11模式变换器设计
Design of a 9.4 GHz overmoded smoothwall TE11HE11 converter
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 quasiGauss mode coupled mode theory iterative synthesis mode converter
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9.1~9.7 GHz范围内均高于99.5%,功率容量4.9 GW。
Abstract
High power microwave(HPM) sources usually employ overmoded output waveguide to obtain higher power capacity. In designing feeder of beam waveguide and reflect antenna, TE11 mode needs to be convert to HE11 mode to radiate a quasiGaussian beam with quite low side lobe. RF breakdown will occur in corrugate gap when traditional corrugated TE11HE11 mode converter is used in HPM field. In order to solve this problem, a method to design overmoded smoothwall TE11HE11 converter was investigated. Using an iterative synthesis method based on coupledmode theory, a 9.4 GHz, 70 mm overmoded smoothwall TE11HE11 converter was designed, and contrast to electromagnetic 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.
徐刚, 余川, 李正红, 廖勇, 谢平. 9.4 GHz过模光滑壁TE11HE11模式变换器设计[J]. 强激光与粒子束, 2013, 25(2): 394. Xu Gang, Yu Chuan, Li Zhenghong, Liao Yong, Xie Ping. Design of a 9.4 GHz overmoded smoothwall TE11HE11 converter[J]. High Power Laser and Particle Beams, 2013, 25(2): 394.