基于悬置微带结构的无反射滤波器  

Reflectionless Filter Based on Suspended Microstrip Structure

作　　者：杨梦洋 肖建康[1] 李小芳 YANG Mengyang;XIAO Jiankang;LI Xiaofang(School of Electro-Mechanical Engineering,Xidian University,Xi’an 710071,China)

机构地区：[1]西安电子科技大学机电工程学院,西安710071

出　　处：《电讯技术》2024年第3期470-477,共8页Telecommunication Engineering

基　　金：国家自然科学基金面上项目(61871458)。

摘　　要：通过悬置微带传输线结构进行了无反射滤波器的研究和设计。首先利用耦合线结构设计了中心频率为3.92 GHz,插入损耗为0.32 dB,在0.1~10 GHz内回波损耗超过11.6 dB,中心频率处超过38 dB的双端口无反射带通滤波器;又利用λ/4开路谐振器和λ/4短路谐振器作为滤波单元,设计了中心频率为4.25 GHz,回波损耗在1.5~6 GHz内超过11 dB,在中心频率处超过40 dB的双端口无反射带阻滤波器。所提出的这两款无反射滤波器具有无反射频带范围宽、工作频带内S_(11)衰减大、多层自封装等突出优点。The authors research and design reflectionless filters based on the suspended microstrip transmission line structure.By using the coupling line,a dual-port reflectionless bandpass filter is designed with center frequency of 3.92 GHz,insertion loss of 0.32 dB,return loss of more than 11.6 dB in the overall range of 0.1~10 GHz,and return loss of more than 38 dB at the center frequency.At the same time,usingλ/4 open-circuited and short-circuited resonators as the basic unit,a dual-port reflectionless bandstop filter is designed with center frequency of 4.25 GHz,return loss of more than 11 dB from 1.5 GHz to 6 GHz,and return loss of more than 40 dB at the center frequency.The proposed reflectionless filters have such outstanding advantages as wide reflectionless frequency band,favorable S_(11)attenuation in working band,and multi-layer self-packaging.

关 键 词：无反射带通滤波器 无反射带阻滤波器 悬置微带线 耦合线 λ/4谐振器 

分 类 号：TN713[电子电信—电路与系统]