多传输零点的宽带带阻滤波器设计  

Design of a kind of wide-stopband bandstop filter with more transmission zeros

作　　者：卑璐璐[1,2] 张申[2] 黄凯[1,2] 翟彦蓉[1,2] 张然[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2期54-57,共4页Electronic Components And Materials

基　　金：国家科技支撑计划资助项目(No.2013BAk06B05);国家科技支撑计划资助项目(No.2012BAH12B01)

摘　　要：提出了一种基于横向型信号干扰的新型多传输零点的宽带带阻滤波器。通过采用终端加载一段四分之一波长开路传输线枝节的弯折型反耦合线与两段对称的半波长传输线开路枝节相并联的方式,在滤波器的阻带内引入了五个传输零点,并在通带内产生了四个反射零点,从而获得了陡峭的过渡带特性、宽阻带特性以及较好的阻带抑制水平。最终设计的宽带带阻滤波器中心频率为3 GHz,20 d B衰减带宽可达106%。Based on the horizontal signal interference, a novel wide-stopband bandstop filter with more transmission zeros performance was proposed and discussed. This filter was constructed by using a curved anti-coupled line with 1/4λopen transmission line stub loaded in terminal to parallel two symmetrical transmission lines of half wavelength open stub. The filter introduced five transmission zeros inside the stopband and four reflection zeros in the passband, which realized steep transition-band characteristic, wide stopband characteristic, and good stopband suppression. Results show that center frequency of the bandstop filter is 3 GHz and the 20 dB attenuation bandwidth is up to 106%.

关 键 词：信号干扰 带阻滤波器 反耦合线 开路枝节 传输零点 反射零点 

分 类 号：TN713[电子电信—电路与系统]