一种新颖的缺陷地微带线低通滤波器

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

• Original Articles • Previous Articles Next Articles

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 E-mail:fwei@mail.xidian.edu.cn

Abstract

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

CLC Number:

TN45

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.

References

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

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