一种新颖的Φ形缺陷地结构低通滤波器

doi:10.13190/jbupt.201103.12.ladsh

北京邮电大学学报 ›› 2011, Vol. 34 ›› Issue (3): 12-16.doi: 10.13190/jbupt.201103.12.ladsh

一种新颖的Φ形缺陷地结构低通滤波器

喇东升，吕英华，张金玲，孙思扬

北京邮电大学电子工程学院，北京 100876

收稿日期:2010-09-07 修回日期:2010-10-26 出版日期:2011-06-28 发布日期:2011-03-29
通讯作者: 喇东升 E-mail:ladongsheng@163.com
基金资助:
国家自然科学基金项目（61072136）；高等学校博士学科点专项科研基金项目（20070013004）

Compact LowPass Filters Using Novel Modified ΦShape  Defected Ground Structure

Received:2010-09-07 Revised:2010-10-26 Online:2011-06-28 Published:2011-03-29
Contact: LA Dong-Sheng E-mail:ladongsheng@163.com

摘要/Abstract

摘要：

为了设计一种高性能的小型微带滤波器，提出了一种新颖的Φ形缺陷地结构（DGS），在此基础上提出了一种加H形开路枝节的Φ形DGS单元模型，以实现低通特性和提高带外抑制度. 采用级联结构设计并制作了一单元、二单元和三单元Φ形DGS低通滤波器. 3个Φ形DGS低通滤波器结构紧凑，二单元和三单元Φ形DGS低通滤波器具有高选择性、低插入损耗和良好的通带性能，三单元Φ形DGS低通滤波器的带外抑制度非常高，在40dB以上. 测试结果与仿真结果一致，证明了该滤波器可满足小型化和高性能的要求.

关键词: 微带低通滤波器, Φ形, 缺陷地结构, H形开路枝节

Abstract:

In order to design a high performance miniaturized microstrip filter, a new Φshape defected ground structure (DGS) is proposed. A Lowpass filter is designed using the Φshape DGS with H shape open stubs line. A one single, twocascaded and threecascaded Φshape DGS lowpass filters is designed, simulated, fabricated and measured repectively. The transmission characteristics of the twocascaded Φshape DGS lowpass filter shows its advantages of compact size, high selectivity, low insertion loss and excellent passband performance. The frequency response of the threecascaded Φshape DGS lowpass filter presents the advantages of compact size; high selectivity; low insertion loss; better passband performance and high outband suppression of more than 40dB. Measurement shows a good agreement with the simulated results. It also validates the requirements of miniaturization and high performance for filters.

Key words: microstrip lowpass filter, Φshape, defected ground structure, H shape open stubs

中图分类号:

TN713

喇东升，吕英华，张金玲，孙思扬. 一种新颖的Φ形缺陷地结构低通滤波器[J]. 北京邮电大学学报, 2011, 34(3): 12-16.

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一种新颖的Φ形缺陷地结构低通滤波器

Compact LowPass Filters Using Novel Modified ΦShape  Defected Ground Structure

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