一种新颖的缺陷地微带线低通滤波器

J4 ›› 2009, Vol. 36 ›› Issue (4): 645-648.

一种新颖的缺陷地微带线低通滤波器

魏峰¹;翟阳文¹;史小卫¹;陈蕾²;黄丘林¹

(1. 西安电子科技大学天线与微波技术重点实验室，陕西西安 710071；
2. 西安工业大学电子信息工程学院，陕西西安 710032)

收稿日期:2008-04-18 出版日期:2009-08-20 发布日期:2009-09-28
通讯作者: 魏峰
基金资助:
陕西省重大科技创新专项资金资助(2007ZKC(一)01-03)

Novel DGS microstrip low-pass filter

WEI Feng¹;ZHAI Yang-wen¹;SHI Xiao-wei¹;CHEN Lei²;HUANG Qiu-lin¹

(1. Key Lab. of Antennas and Microwave Technology, Xidian Univ., Xi'an 710071， China;
2. School of Electronic Information Eng., Xi'an Tech. Univ., Xi'an 710032， China)

Received:2008-04-18 Online:2009-08-20 Published:2009-09-28
Contact: WEI Feng

摘要/Abstract

摘要：

传统的微带线低通滤波器尺寸偏大，阻带较窄，针对此问题提出了一种新型微带线低通滤波器，该滤波器由半圆型缺陷地结构(S-DGS)单元和半圆型阶梯阻抗并联枝节(S-SISS)级联而成．分析了S-DGS和S-SISS的参数变化对其带阻特性的影响，建立了微带线滤波器的等效电路模型．该滤波器结构紧凑，3dB截止频率为2.7GHz，阻带为4~16GHz，比传统缺陷地结构滤波器阻带拓宽了20％．测试结果与仿真结果吻合较好，验证了所设计滤波器的可靠性．

关键词: 缺陷地结构, 阶梯阻抗并联枝节, 微带线, 低通滤波器

Abstract:

A conventional microstrip low-pass filter has a large area and a narrow stop-band. To solve this problem, a new microstrip low-pass filter is presented in this paper, which is composed of semicircle defected ground structures and semicircle stepped-impedance shunt stubs. The effect of parameter variation of S-DGS and S-SISS on band-stop characteristic is studied. An equivalent circuit model of the proposed LPF is also described. The proposed filter is compact and the 3dB cutoff frequency is 2.7GHz. The stop-band is 4~16GHz, which is wider by 20％ than that of the conventional DGS filter. Simulation results are in good agreement with the measured results, which verifies the reliability of the designed filter.

Key words: defected ground structure (DGS), semicircle stepped-impedance shunt stubs (S-SISS), microstrip lines, low pass filters

中图分类号:

TN45

魏峰;翟阳文;史小卫;陈蕾;黄丘林. 一种新颖的缺陷地微带线低通滤波器[J]. J4, 2009, 36(4): 645-648.

WEI Feng;ZHAI Yang-wen;SHI Xiao-wei;CHEN Lei;HUANG Qiu-lin. Novel DGS microstrip low-pass filter[J]. J4, 2009, 36(4): 645-648.

参考文献

defected ground structure (DGS)|semicircle stepped-impedance shunt stubs (S-SISS)|microstrip lines|low pass filters
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