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一种新颖的DMS低通滤波器的分析与设计

薛玉杰，杨雪霞，陆祎敏   

  1. 上海大学 通信与信息工程学院，上海 200072
  • 收稿日期:2006-09-05 修回日期:2006-12-28 出版日期:2007-05-31 发布日期:2007-05-31

Design and Analysis of A Novel DMS Low-Pass Filter

XUE Yu-jie, YANG Xue-xia, LU Yi-min   

  1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China
  • Received:2006-09-05 Revised:2006-12-28 Online:2007-05-31 Published:2007-05-31

被引次数

4

摘要： 基于缺陷微带结构（DMS）提出了一种新颖的低通滤波器。首先利用三维电磁场仿真软件分析了DMS微带线的S参数频响特性，用微波电路分析软件讨论了DMS微带线的等效电路及其参数提取。然后利用该DMS结构设计、制作了一个低通滤波器，测得该低通滤波器的3dB截止频率fc为3.4GHz，通带内最大波纹为0.3dB，插入损耗大于15dB的阻带宽度为13GHz。仿真结果和实验测试结果非常吻合，验证了等效电路的有效性和DMS低通滤波器的可实现性。

关键词: 缺陷微带结构, 等效电路, 低通滤波器

Abstract: A novel low-pass filter using defected microstrip structure (DMS) is proposed in this paper. The frequency characteristics of the DMS are simulated with three-dimension electromagnetic field analysis software. Its equivalent circuit and equivalent parameters are extracted with microwave circuit analysis software. Then a novel low-pass filter using DMS is designed and fabricated. The measured 3dB cutoff frequency fc is 3.4GHz with 0.3dB ripple level. The rejection bandwidth of the insertion loss less then ?15dB is 13GHz. The experimental results show good agreement with simulation, validating effectiveness of the equivalent circuit and the realization of the DMS LPF.

Key words: defected microstrip structure (DMS), equivalent circuit, low-pass filter