Design of defected ground structure microstrip low-pass filters

Huang Peng; Huang Yongmao; Li Liangrong; Jin Haiyan

doi:10.11884/HPLPB201830.180235

Volume 30 Issue 12

Dec. 2018

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Article Navigation > High Power Laser and Particle Beams > 2018 > 30(12): 123003

Huang Peng, Huang Yongmao, Li Liangrong, et al. Design of defected ground structure microstrip low-pass filters[J]. High Power Laser and Particle Beams, 2018, 30: 123003. doi: 10.11884/HPLPB201830.180235

Citation:

Huang Peng, Huang Yongmao, Li Liangrong, et al. Design of defected ground structure microstrip low-pass filters[J]. High Power Laser and Particle Beams, 2018, 30: 123003. doi: 10.11884/HPLPB201830.180235

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Design of defected ground structure microstrip low-pass filters

doi: 10.11884/HPLPB201830.180235

Huang Peng^1
,,
Huang Yongmao²,
Li Liangrong^{1
,
,},
Jin Haiyan^{3
,
,}

1.
College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, China
2.
School of Electrical and Electronic Information, Xihua University, Chengdu 610039, China
3.
School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Received Date: 2018-09-13
Rev Recd Date: 2018-11-26
Publish Date: 2018-12-15

Abstract

Abstract

A novel compact microstrip low-pass filter with wideband suppression is proposed in this paper. The filter is composed of defect ground structure (DGS) and stepped impedance structure unit. The model was built and optimized by ANSYS HFSS. The simulation results show that the cut-off frequency of the low-pass filter is 1.4 GHz, the passband width is 0-1.4 GHz, the insertion loss in the passband is less than 0.5 dB, the out-of-band rejection frequency width is from 2.1 GHz to 11 GHz, and the out-of-band rejection in the stopband range is about 20 dB. In order to verify the test results and simulation results, an optimized defect-structured microstrip low-pass filter was processed and tested. The practical measurement are in good agreement with the simulation results. It is proved that the defect ground structure plays an important role in realizing the miniaturization of the filter and the wide impedance bandwidth. Moreover, the defect ground structure provides better low-pass filtering characteristics to the filter.
- defected ground structure,
- low-pass filter,
- microstrip filter,
- out-band suppression,
- stopband,
- stepped impedance structure

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References(11)

References

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