60GHz缺陷态同轴布喇格波导窄带带通滤波器设计及性能分析  

Design and Analysis of a 60 GHz Narrowband Band-pass Filter Filter Based on Defected Coaxial Bragg Waveguide

作　　者：赖颖昕[1] 谭永明[1] 

机构地区：[1]东莞理工学院电子工程学院,东莞523808

出　　处：《电子与信息学报》2012年第8期2023-2027,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60871023);广东省高校优秀青年创新基金(LYM10126);东莞市高等院校;科研机构科技计划项目(2011108102011)资助课题

摘　　要：基于缺陷态同轴布喇格波导的通带特性，该文采用多波耦合理论及AnsoftHFSS对一种工作频率为60GHz的新型波导滤波器原型进行了概念性设计，并进行性能分析。结果表明：大尺寸的缺陷态布喇格滤波器在高频工作时，主模与竞争模式之间的寄生耦合会破坏通带结构；当波纹幅度引入汉明窗分布，可以有效地消除这一负面影响。该滤波器具有通带窄（相对带宽小于0．1％）、中心插入损耗小（低于1．5dB）、结构横向大尺寸大（半径7-10mm）的优点，能够适用于毫米波段高功率应用场合中对窄频带信号选择。Based on the pass-band characters of defected coaxial Bragg waveguides, a novel topology of narrow-band, band-pass millimeter-wave filter at 60 GHz is designed and analyzed by making use of the multi-wave interaction formulation as well as software Ansoft HFSS. It is found that, if a defected Bragg filter with a large transverse dimensional size operates at high frequency, the spurious coupling between the operating mode and the competing modes will spoil the pass-band structure; but fortunately, this negative effect can be suppressed by applying Hamming-window-function distribution to the ripples amplitude of the filter. Results show the filter has a narrow fractional bandwidth less than 0.1% with a low insertion loss below 1.5 dB and large dimensional size, which favors to select the specified narrow-band signal in high power applications.

关 键 词：带通滤波器 窄带 同轴布喇格结构 波纹波导 

分 类 号：TN814[电子电信—信息与通信工程]