一种基于EBG结构的超宽带陷波滤波器设计  

A UWB Filter with Narrow Notched Band Based on Electromagnetic Bandgap Structures

作　　者：黄世界 李泰 武明西 HUANG Shijie;LI Tai;WU Mingxi(Department of Electronic Information Engineering,Bozhou University,Bozhou 236800,China)

机构地区：[1]亳州学院电子与信息工程系,安徽亳州236800

出　　处：《洛阳理工学院学报（自然科学版）》2024年第4期62-67,共6页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：安徽省质量工程项目(2023SYYJ053);安徽省高校科学研究重点项目(2024AH051309);安徽省质量工程项目(2022XJZLTS027);亳州学院质量工程项目(2023XJXM052);亳州市科技攻关项目(BZZC2023035).

摘　　要：提出了一种基于电磁带隙结构具有陷波功能的高选择性超宽带带通滤波器。滤波器采用圆形开路枝节加载阶跃阻抗谐振器实现,通过加载圆形开路枝节使滤波器5个模式的谐振频率均匀分布3.1~10.6 GHz的通带上,并在上边带和下边带处各引入了一个传输零点。在滤波器的输入输出端口加载缺陷结构,用来增加滤波器的端耦合降低插入损耗。为了屏蔽来自周围窄带信号对超宽带系统的干扰,在开路枝节的两侧加载环形电磁带隙结构,实现了对X波段卫星上行通信系统(7.9~8.395 GHz)信号的屏蔽。滤波器的通带范围2.61~10.63 GHz,阻带范围为7.9~8.45 GHz,通带插损仅为0.8 dB,仿真和实测结果基本保持一致。A novel high-selectivity UWB band pass filter with notched bands based on the electromagnetic bandgap(EBG)structures is presented.UWB BPF is realized by using circular open stub loaded stepped-impedance stub resonator(SIR).The special structure of the resonator causes the filter to have five uniformly distributed resonant modes in the passband of 3.1-10.6 GHz,and produces two transmission zeros in the upper and lower bands.A pair of rectangular defect ground structures(DGS)are adopted to suppress the insert loss by adding port coupling strength.To shield the electromagnetic interference of the narrow-band around,A pair of circular EBG structure are implemented on both sides of the open stub to achieve the shielding band at 7.9-8.395 GHz.The passband is from^(2).61-10.63 GHz Stopband Range is from 7.9-8.45 GHz.The insertion loss is only 0.8 dB.The simulated and measured results are identical.

关 键 词：超宽带 陷波 电磁带隙结构 滤波器 

分 类 号：TN713[电子电信—电路与系统] TN911.72