新型紧凑型带通滤波器的设计  

Design of Novel Compact Bandpass Filter

作　　者：周立学[1] 李辉[1] 路龙龙[1] 

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2011年第1期79-82,共4页Fire Control Radar Technology

摘　　要：文章设计了两个通带位于超宽带低频范围的带通滤波器,用一种T型结构来代替传统带通滤波器中的四分之一波长传输线,这种替代减小了滤波器的尺寸。而且,可以很方便的控制位于滤波器通带两端的传输零点,即合理的调节开路支线的电长度,进而可以方便的控制滤波器的通带范围。为了证明以上新型滤波器的优点,设计了两个开路支线电长度不同的带通滤波器。从最终仿真结果可以看出,试验值与预先设计的理论值是基本一致的,而且都实现了通带边沿的锐截止特性。Two bandpass filters with passband within lower-band of ultra-wideband（UWB） are designed.Through replacing conventional quarter-wavelength transmission line in bandpass filter with a T-shape structure,size of the filter is reduced and compact design is achieved.Transmission zero points at both ends of passband can be easily controlled by adjusting electric length of open stubs;therefore passband scope can be controlled conveniently.In order to demonstrate advantages of the new filter,two bandpass filters which have open-stub structures with different electric length are designed.Simulation results show that experiments values and theoretical values pre-designed are basically coincident;and sharp cutting-off feature at the edge of passband is achieved in both of these two bandpass filters.

关 键 词：带通滤波器 宽带 开路支线 中心频率 

分 类 号：TN713.5[电子电信—电路与系统]