一种新颖的小型宽阻带低通滤波器  

A Novel Compact Wide-stopband Low-pass Filter

作　　者：周明[1,2] 童创明[1,2] 付树洪[1,2] 吴利楠[1,2] 倪国旗[3] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800 [2]毫米波国家重点实验室,南京210096 [3]桂林空军学院,广西桂林541003

出　　处：《电讯技术》2010年第4期74-77,共4页Telecommunication Engineering

基　　金：毫米波国家重点实验室自然科学基金项目(K200818)~~

摘　　要：提出了一种新颖的具有C-型几何结构的小型宽阻带低通滤波器。通过弯曲微带线,缩减了低通滤波器尺寸。采用补偿线和渐变技术对微带线进行调整,使所提出的低通滤波器获得了低插损,同时获得宽阻带。对提出的结构作了加工并进行了实物测量,结果表明,所设计滤波器的通带反射损耗的最大旁瓣幅度为-19.5 dB,阻带(S21<-20 dB)宽度为10.1 GHz,而且面积只有6.28 cm2。A novel compact wide-stopband low-pass filter（LPF） with C-shape geometry is proposed. By employing C-shape geometry of the microstrip line, the physical size of the proposed structure is reduced significantly compared with the size of the conventional straight structures. By employing compensated microstrip line and linear tapering techniques, the proposed structure achieves lower ripple level in the passband and wide bandwidth in the stopband. The structure is fabricated and measured, and the results show that the maximal return loss sidelobe level is - 19.5 dB, the stopband width （S21 〈 -20 dB） is 10.1 GHz,and the occupied area is only 6.28 cm2.

关 键 词：低通滤波器 微带线 缺陷地面结构 电磁带隙 

分 类 号：TN713[电子电信—电路与系统] TN015