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基于超材料的TEM-TE11 高功率微波模式转换器
引用本文:秦奋,王冬 徐莎 范植开.基于超材料的TEM-TE11 高功率微波模式转换器[J].微波学报,2014,30(S2):360-363.
作者姓名:秦奋  王冬 徐莎 范植开
作者单位:(1. 中国工程物理研究院研究生部,北京 100088; 2. 中国工程物理研究院应用电子学研究所 高功率微波技术重点实验室,绵阳 621900)
基金项目:中国工程物理研究院发展基金(2012B0402066), 高功率微波技术重点实验室基础科研课题(HAK-2014HPM-07)
摘    要:利用高功率容量高折射率的超材料作为移相介质,设计了一种高功率微波TEM-TE11 模式转换器。采用扇形金 属栅格作为材料阵元,通过对阵元的角向及轴向的周期排布得到高折射率超材料并将其填充在模式变换区角向半空间内。 TEM 模微波在通过模式转换区域之后,超材料填充区域电场与未填充材料的真空区域电场相位差达到180°,从而实现 TEM 模到TE11 模的模式转换。采用CST Microwave Studio 软件对模式转换器进行了数值模拟,结果显示该转换器在工 作频点附近具有较高的转换效率,相对带宽约4%。结合模式变换器开展了辐射天线的设计,模拟得到典型的TE11 模远 场方向图。

关 键 词:超材料  模式变换  阵元  周期结构  高功率微波

A metallic metamaterial high power microwave mode converter
QIN Fen,WANG Dong,XU Sh,FAN Zhi-kai.A metallic metamaterial high power microwave mode converter[J].Journal of Microwaves,2014,30(S2):360-363.
Authors:QIN Fen  WANG Dong  XU Sh  FAN Zhi-kai
Affiliation:(1. Graduate School, China Academy of Engineering Physics, Beijing, 100088; 2. Science and Technology on High Power Microwave Laboratory, Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900)
Abstract:A metallic metamaterial high power microwave (HPM) mode converter which converts cylindrical TEM mode to TE11 mode is presented. Metallic sector grid elements are periodically arranged both in the azimuthally and longitudinal direction to gain high refractive index. High refractive index metamaterial fills half space of the cylindrical transmission line of the mode converter in the azimuthally direction. The phase of electric field was shifted from 0 degree to 180 degrees between the metamaterial part and the vacuum part as the microwave propagates though the mode converter, hence the microwave mode is converted from TEM mode to TE11 mode. The mode converter is simulated by 3D commercial electromagnetic simulation software CST Microwave Studio. Simulation results show that the converter has high convert efficiency with bandwidth of about 4%. Radiation antenna with metamaterial mode converter is simulated. The radiation pattern reveals a typical TE11 mode pattern which validates the design of mode converter.
Keywords:net weather radar  sensor grid  space-time unification  information fusion
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