上海大学学报(自然科学版)

• 通信与信息工程 • 上一篇    下一篇

一种新型缺陷地结构及其在低通滤波器中的应用

钟小明,李国辉   

  1. 上海大学 通信与信息工程学院,上海 200072
  • 收稿日期:2005-05-10 修回日期:1900-01-01 出版日期:1900-01-01 发布日期:1900-01-01
  • 通讯作者: 李国辉

A Novel Defected Ground Structure and Its Application to Lowpass Filter

ZHONG Xiao-ming,LI Guo-hui   

  1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China

  • Received:2005-05-10 Revised:1900-01-01 Online:1900-01-01 Published:1900-01-01
  • Contact: LI Guo-hui

摘要:

提出一种新型的缺陷地结构,并研究了它的各个缺陷参数对其特性的影响,然后用该结构设计了一个低通滤波器.实验结果表明,用这种结构实现的低通滤波器具有极宽的阻带,其20 dB的阻带宽度约为截止频率的3.7倍,因此有效地抑制了滤波器的高次谐波响应.另外,通过用缺陷地结构实现高阻抗电感,有效地改善了滤波器的高功率处理能力.

关键词: 低通滤波器, 陡峭因子, 缺陷参数, 缺陷地结构, 选择性

Abstract:

A novel defected ground structure (DGS) is proposed and the effect of the defect parameters on its performances is presented. A lowpass filter is designed using the proposed DGS. Experimental results confirm that the lowpass filter can provide a very wide stopband with 20 dB bandgap, which is approximately 3.7 times of the cutoff frequency. Therefore the higher order harmonic responses are effectively suppressed. In addition, the highimpedance inductances are realized by using DGS so that highpower handling capability is improved.

Key words: defect parameters, lowpass filter, selectivity

, sharpness factor,

defected ground structure