带有锥度结构的同轴开槽布拉格反射器研究

摘要

A coaxial Bragg reflector with tapered inner rode corrugated ripples and phase matching section used in relativistic diffraction generator （RDG） with overmode cylindrical structure in Ka-band is presented and analyzed in this paper. The conservation of complex power technique（CCPT） is introduced to analyze the frequency response of the Bragg reflector. The influences of the phase matching section length, the corrugated sinusoidal slots depth and the tapered angle of the reflector on frequency response are studied. It is found by analyzing the influence of the initial ripple phase that the reflector has a favourable characteristic for mode selection. The research results provide important theoretical analysis and data reference for designing coaxial Bragg reflector structure.%本文提出在Kα波段圆柱过模结构绕射辐射器件（RDG）中引入一种带有锥度结构的同轴内开槽布拉格反射器.采用复功率守恒技术（CCPT）对该反射器的频率响应特性进行分析.研究了相位匹配段长度,波纹槽深及锥度对反射器频率响应特性的影响,分析了波纹初始相位对反射器选模特性的影响,发现该反射器具有良好的模式选择特性.本文的研究工作为同轴Bragg反射器结构的研究提供了重要的理论分析手段.