陷波频率可重构的超宽带滤波器设计  

Design of Ultra-Wideband Filter with Reconfigurable Notch Frequency

作　　者：孙雯婕 张旭[1] 赵梦晨 何明[1] SUN Wenjie;ZHANG Xu;ZHAO Mengchen;HE Ming(College of Electronic Information and Optical Engineering,Nankai University,Tianjin 300350,China)

机构地区：[1]南开大学电子信息与光学工程学院,天津300350

出　　处：《压电与声光》2024年第6期973-978,共6页Piezoelectrics & Acoustooptics

基　　金：天津市自然科学基金面上项目(21JCYBJC00080)。

摘　　要：以多模谐振器为基础,设计了一种新型陷波可重构超宽带滤波器。基于传输线理论和奇偶模理论设计多模谐振器结构,利用HFSS与ADS联合仿真确定滤波器的尺寸参数,通过在滤波器枝节上加载变容二极管来实现滤波器陷波的可重构。设计得到的超宽带滤波器中心频率为3.35 GHz,3 dB相对带宽为68.7%,且陷波频率独立可调节。仿真结果表明通带内陷波频率可调范围为3.2~4 GHz,相对可调范围为33%,通带内插入损耗在0.5 dB以内。对该滤波器进行加工并实际测量,得到的陷波可调范围为3.3~4.02 GHz,与仿真结果基本吻合。实验结果表明,该可重构超宽带滤波器的结构简单,尺寸较小,陷波可调范围宽,能有效地抑制系统内的干扰信号。The design of a notch reconfigurable ultra-wideband filter based on a multimode resonator is presented in this paper.The structure of the multi-mode resonator is designed based on transmission line theory and odd-even mode theory.The dimension parameters of the filter are determined via the joint simulation of HFSS and ADS.The notch of the filter is reconfigurable by loading varactor-diodes on the filter branches.The center frequency of the designed ultra wideband filter is 3.35 GHz,with a 3 dB relative bandwidth of 68.7%,and the notch frequency is independently adjustable.The simulation results show that the adjustable range of notch frequency in the passband is 3.2-4 GHz,with a relative adjustable range of 33%.The insertion loss in the passband is within 0.5 dB.After processing and actual measurement of the filter,the tunable range of the notch obtained is 3.3-4.02 GHz,which is consistent with the simulation results.The designed reconfigurable ultra-wideband filter has a simple structure,small size,wide notch adjustable range,and can effectively suppress interference signals in the system.

关 键 词：多模谐振器 陷波 可重构 超宽带 变容二极管 

分 类 号：TN713[电子电信—电路与系统]