Compact bandpass filter based on two meandered parallel-coupled lines in different lengths  

作　　者：CUI Dong-nuan LIU Yuan-an LI Shu-lan YU Cui-ping 

机构地区：[1]School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2012年第3期33-36,共4页中国邮电高校学报（英文版）

基　　金：supported by the National Science and Technology Major Project (2010ZX03007-003-04, 2009ZX03005-002-02);the National Natural Science Foundation of China (61001060)

摘　　要：A new compact bandpass filter based on two meandered parallel-coupled lines of different lengths in shunt is presented, using the signal-interference technique, this filter obtains a low insertion loss and sharp rejection. A set of analytical formulas and guidelines for the design of the bandpass filter are provided in two theoretical analysis methods. According to the number of attenuation poles of the reflection coefficients in the passband, it can be summed up two types of filters. To validated this topology, two wideband bandpass filters centered at 3 GHz are built to verify the theoretical prediction, the measured frequency response of the filter agrees excellently with the predicted result.

关 键 词：meandered parallel-coupled lines signal-interference technique attenuation poles 

分 类 号：TN713.5[电子电信—电路与系统] TN713