一种新型的高抑制度波导滤波器设计  

Design of a novel waveguide filter with high suppression

作　　者：张宇[1,2] 渠芳芳 Zhang Yu;Qu Fangfang(The 39th Research Institute of CETC,Xi′an 710065,China;Shaanxi Key Laboratory of Antenna and Control Technology,Xi′an 710065,China)

机构地区：[1]中国电子科技集团公司第39研究所,陕西西安710065 [2]陕西省天线与控制技术重点实验室,陕西西安710065

出　　处：《电子技术应用》2022年第7期110-113,共4页Application of Electronic Technique

摘　　要：针对目前频谱资源拥挤所提出的频带间高隔离度需求,提出了一种新型的小型化高抑制度波导滤波器。在传统波导滤波器的非相邻谐振腔间引入新型的波导CT型感性交叉耦合结构,使其在阻带产生有限的传输零点,进一步提高带外抑制,缩小了滤波器的体积,且降低了因腔体个数而引入的损耗。同时,根据其结构的不连续性,采用模式匹配法进行优化设计,设计周期短,性能很好。According to the current requirements for high isolation between frequency bands caused by congested spectrum resources,a new type of miniaturized high suppression waveguide filter is proposed in this paper.Based on traditional waveguide filters,this paper introduces a new CT-type inductive cross-coupling structure between non-adjacent resonators which results in limited transmission zeros in the stopband,and further improves out-of-band rejection,reduces the size of the filter,and reduces the loss introduced by the number of cavities.At the same time,because of the discontinuity of its structure,the mode-matching technique is used to design and optimize the filter.With this method,the design cycle of filter is very short and performance is particularly good.

关 键 词：高抑制度 交叉耦合 传输零点 模式匹配法 

分 类 号：TN713[电子电信—电路与系统]