一种新型传输零点可控的微带带通滤波器  

A Novel Microstrip Bandpass Filter with Controllable Transmission Zeros

作　　者：陈董[1] 黄晓东[1] 程崇虎[1] 

机构地区：[1]南京邮电大学电子科学与工程学院,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2009年第2期51-54,共4页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

摘　　要：提出了一种新型的传输零点可控的微带带通滤波器结构,它由一段低阻抗线和与之相连的平行耦合线构成。通过调节低阻抗线与平行耦合线的偶模阻抗比,可以改变谐振器的2个模式之间的距离,从而灵活的调节滤波器的带宽;而通过调节平行耦合线的间距,则可以方便的调节传输零点的位置。仿真与实测结果都表明该滤波器具有良好的性能:低插损,结构紧凑,可以灵活的调节带宽和传输零点的位置。A novel microstrip bandpass filter with controllable transmission zeros is presented in this paper,which consists of a low impedance line and parallel coupling lines. By tuning the impedance ratio of the low impedance line and even mode impedance of the coupling lines, the first two modes of the resonator could be moved to form the passband. The location of the transmission zeros can be adjusted by changing the distance between the coupling lines. The simulating and testing results show that the bandpass filter has good performance, including low insertion loss, compact size and controllable bandwidth, and transmission zeros.

关 键 词：带通滤波器 传输零点 平行耦合线 

分 类 号：TN61[电子电信—电路与系统]