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

• 研究论文 • 上一篇    下一篇



  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:


Novel DGS microstrip low-pass filter

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

  1. (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



关键词: 缺陷地结构, 阶梯阻抗并联枝节, 微带线, 低通滤波器


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


  • TN45