基于反耦合线的宽带带通滤波器设计  

Novel wideband bandpass filter-based on anti-coupled line

作　　者：黄凯[1,2] 张申[2] 卑璐璐[1,2] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008 [2]中国矿业大学物联网(感知矿山)研究中心,江苏徐州221008

出　　处：《电子元件与材料》2015年第4期39-42,共4页Electronic Components And Materials

基　　金：国家"973"计划资助项目(No.2014CB046305);国家科技支撑计划资助项目(No.2012BAH12B02)

摘　　要：提出一种新型的基于反耦合线结构的宽带带通滤波器,该滤波器结构由一段弯折型反耦合线以及一个开路传输线枝节组成。采用奇偶模分析法对所提出的滤波器结构进行分析并进行仿真。结果表明,选择适当电路参数,该滤波器可以产生六个传输零点。对设计的两个带通滤波器(Filter-A和Filter-B)进行仿真和实测。结果如下:中心频率为3 GHz时,Filter-A百分比带宽为47%,Filter-B为40%,结果表明在带内插损较低、群延迟较好的情况下,该类滤波器在百分比带宽上有一定优势。A simple wideband bandpass filter based on anti-coupled lines circuit configuration was proposed. This filter configuration was composed of a length of bending anti-coupled line and an open-circuit transmission-line stub. The proposed filter structure was analyzed by using the even-mode and odd-mode analysis method and simulated. The results show that by selecting the appropriate circuit parameters, the filter can appear six transmission zeros. Two designed bandpass filters（Filter-A and Filter-B） were simulated and produced. The results are as follows： when the center frequencies of the two filters are 3 GHz, the percentage bandwidths of Filter-A and Filter-B are 47% and 40%, respectively. The measured results show that the filter has certain advantages on the percentage bandwidth under the lower insertion loss in band and better group delay.

关 键 词：反耦合线 带通滤波器 开路枝节 传输零点 插入损耗 群延迟 

分 类 号：TN713[电子电信—电路与系统]