波纹误差对同轴布拉格结构反射特性的影响  

Effect of random corrugation errors on reflection characteristics of coaxial Bragg structure with rectangular ripples

作　　者：赖颖昕[1] 危喜临[1] 王善进[1] 张世昌[2] 

机构地区：[1]东莞理工学院电子工程学院,广东东莞523808 [2]西南交通大学信息科学与技术学院,成都610031

出　　处：《强激光与粒子束》2015年第8期113-118,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(61471122);国家重点基础研究发展计划项目(2013CB834305);广东省科技计划项目(2013B010401040);广东省教育厅青年创新人才项目(2014KQNCX220)

摘　　要：利用模式匹配法建立了分析波纹参数具有随机误差的矩形槽同轴布拉格结构反射特性的理论模型,并以一个以基模(TEM)工作于220GHz附近的矩形槽同轴布拉格结构为例,研究了矩形凹槽的深度、宽度、周期长度以及位置的随机误差对其反射率频率响应的影响。数值模拟结果表明:在给定的误差范围条件下,凹槽宽度与位置的随机误差对该结构的反射性能影响较小,而凹槽深度与周期长度的随机误差是影响结构反射特性的主要因素,因此在结构的加工制备过程中应视器件性能要求严格控制两者的制造公差。By using the mode-matching method,a theoretical model is presented to analyze the reflection characteristics of the coaxial Bragg structures corrugated with rectangular ripples,where the inner-rod and outer-wall ripples have random parameters due to fabrication error.Numerical simulations are carried out to investigate the effect of the errors of the corrugated depth,corrugated width,length of period and ripple position on the reflectivity frequency response for a coaxial Bragg structure which operates with TEM mode in the vicinity of 220 GHz.Numerical results reveal that,with a given range of error values,the random errors of corrugated width and ripple position have less influence on the reflection spectrum,while the random errors of corrugated depth and length of period critically affect the reflection properties of the example structure.Therefore,the manufacturing tolerances of these two parameters should be strictly controlled in accordance with the performance of the devices employed with coaxial Bragg structures.The theoretical model as well as the corresponding numerical code may provide engineering references for further applications of the coaxial Bragg structure with rectangular ripples.

关 键 词：同轴布拉格结构 模式匹配法 矩形槽 加工误差 反射率 

分 类 号：TN814[电子电信—信息与通信工程]