基于DGS的切比雪夫低通滤波器设计  

Design of the Chebyshev low⁃pass filter based on defective ground structure

作　　者：刘飞燕 漆世锴 梁琳琳 许勤[1] 秦永华[1] LIU Feiyan;QI Shikai;LIANG Linlin;XU Qin;QIN Yonghua(School of Electronic and Information Engineering,Jiujiang University,Jiujiang 332005,China;School of Cyber Engineering,Xidian University,Xi’an 710068,China)

机构地区：[1]九江学院电子信息工程学院,江西九江332005 [2]西安电子科技大学网络与信息安全学院,陕西西安710068

出　　处：《电子设计工程》2024年第16期17-21,26,共6页Electronic Design Engineering

基　　金：国家自然科学基金(62161014);江西省教育厅科技项目(201818);九江市科技项目(S2021ZDYFN0046)。

摘　　要：为了抑制微波传输系统中的高次谐波以及杂散信号,采用DGS(缺陷地结构)来设计低通滤波器。通过在经典的五阶切比雪夫低通滤波器的接地面上蚀刻多个哑铃型DGS结构,获得了较好的通带和阻带性能。仿真及测试结果显示,采用DGS结构设计的低通滤波器,其通带截止频率为1.4 GHz,0~1.4 GHz通带内回波损耗值优于-20 dB且插入损耗值小于0.5 dB,阻带范围为2~10 GHz。经实物加工测试分析表明,实测结果与仿真结果吻合较好。设计的DGS结构低通滤波器在无线通信系统中具有一定的应用前景。In order to suppress high⁃order harmonics and spurious signals in microwave transmission systems,a Defective Ground Structure(DGS)was used to design a low⁃pass filter in this article.By etching multiple dumbbell⁃shaped DGS structures on the ground plane of a classic fifth⁃order Chebyshev low⁃pass filter,better passband and stopband performance than the Chebyshev low⁃pass filters were obtained.The simulation and test results show that the Chebyshev low⁃pass filter designed with DGS structure has a passband cutoff frequency of 1.4 GHz,the return loss value within the 0~1.4 GHz Passband is better than-20 dB and the insertion loss value is less than 0.5 dB.The stopband range is 2~10 GHz.Good agreement between the measured and simulated results is obtained.The DGS structure low⁃pass filter designed has certain application prospects in wireless communication systems in this article.

关 键 词：缺陷地结构(DGS) 切比雪夫 阻带 低通滤波器 回波损耗 

分 类 号：TN713[电子电信—电路与系统]