Q波段圆波导轴线弯曲TE01-TE11模式变换器设计

张贺; 罗勇; 徐勇

doi:doi:10.3724/sp.j.1010.2013.00414

红外与毫米波学报, 2013, 32 (5): 414, 网络出版: 2013-10-23

Q波段圆波导轴线弯曲TE01-TE11模式变换器设计

Q-band TE01-TE11 high power microwave mode converter

论文大纲

张贺 ^*罗勇徐勇

作者单位

电子科技大学物理电子学院, 四川成都 610054

回旋行波管 Q波段耦合波理论 TE01-TE11模式变换 Gyro-TWT Q-band Coupling wave theory TE01-TE11Mode converter

摘要

在模式耦合理论的基础上, 采用相位重匹配技术对圆波导轴线弯曲TE01-TE11模式变换器进行了数值优化计算和分析.在Q波段给出了两种不同周期数TE01-TE11模式变换器的优化设计参数.数值计算表明: 四周期模式变换器的最高转换效率为98.82%, 带宽为2.2 GHz, 六周期最高转换效率为99.89%, 带宽为1.7 GHz.研究了模式变换器关键几何尺寸在小范围内变化对转换效率的影响.并利用HFSS对给出的模式变换器进行了仿真, 仿真结果与数值模拟一致性较好.同时加工了六周期结构模式变换器并进行了小功率热测实验, 测试结果表明输出了模式纯度较高的TE11模式.

Abstract

Based on the coupling wave theory and phase re-matching technique, a Q-band TE01-TE11 circular waveguide mode converter for transmitting high power microwave has been designed and analyzed by numerical calculation and simulation. Results of 4-period and 6-period mode converter are demonstrated in this paper. The numerical calculation show that maximum conversion efficiency is 98.82% and bandwidth is over 2.2GHz for 4-period structure. However, for the 6-period one, the maximum conversion efficiency is 99.89% and bandwidth is over 1.7GHz. It also presented the influence of the key parameters on the conversion efficiency. Simulated results from HFSS agreed well with the numerical calculation. Based on the theory and simulated results, a mode converter was fabricated and tested. It turned out that a pure TE11 mode was abtained.

参考文献

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张贺, 罗勇, 徐勇. Q波段圆波导轴线弯曲TE01-TE11模式变换器设计[J]. 红外与毫米波学报, 2013, 32(5): 414. ZHANG He, LUO Yong, XU Yong. Q-band TE01-TE11 high power microwave mode converter[J]. Journal of Infrared and Millimeter Waves, 2013, 32(5): 414.

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