TEM-TE11 high power microwave mode convertor with metallic metamaterial
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摘要: 利用高折射率的金属超材料作为移相器，设计了一种紧凑型高功率微波TEM-TE11模式转换器。通过研究同轴扇形金属栅格超材料的传输特性，得到高折射率的全金属超材料。采用CST Microwave Studio 软件对金属超材料TEM-TE11模式转换器进行了数值模拟，结果显示：该转换器在1.56 GHz附近转换效率大于96%，相对带宽约4%，功率容量不低于2 GW，系统纵向长度仅0.42个波长。将所设计的模式转换器结合L波段磁绝缘线振荡器开展了一体化设计，在器件输出口得到了TE11模高功率微波输出。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 azimuthal and longitudinal directions to gain high refractive index to act as phase shifter in the convertor. The mode converter is simulated by 3D commercial electromagnetic simulation software CST Microwave Studio. Simulation results show that the converter has high conversion efficiency with a relative bandwidth of about 4%. The radiation antenna with a metamaterial mode converter is simulated. The mode convertor is simulated combined with an L-band MILO tube using a particle-in-cell software, and a TE11 mode HPM is obtained in the outlet of the tube.
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