Development of Wideband Microstrip Bandpass Filters Using DGS and Stub

Authors

  • นิวัตร์ อังควิศิษฐพันธ์ Research Unit for Computational Electromagnetics and Optical Systems, Faculty of Engineering, Mahasarakham University, Thailand
  • ณัฐพงศ์ บุตรธนู Research Unit for Computational Electromagnetics and Optical Systems, Faculty of Engineering, Mahasarakham University, Thailand
  • ศราวุธ ชัยมูล Department of Eleectrical Engineering, Faculty of Engineering, Khon kaen University

Keywords:

Wideband bandpass filters, Defected ground structure, Microstrip, Stub

Abstract

This research paper proposed the development of wideband microstrip bandpass filters using defected ground structure (DGS) with folded spurline structure and stub. DGS with folded spurline structure provided the resonant frequencies at 2.1 GHz and 3.3 GHz, respectively. From the measured results of the proposed filters, it obtained the center frequency of 2.89 GHz with a wide bandwidth of  64.70 %, the transmission coefficients  of -3 dB and reflection coefficients  of -16 dB. The transmission coefficients  were reduced to -15 dB at the stopband of 4.5 - 8.0 GHz. The simulated results and experimental results were in good agreement.

References

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Published

2018-12-24

How to Cite

[1]
อังควิศิษฐพันธ์ น., บุตรธนู ณ., and ชัยมูล ศ., “Development of Wideband Microstrip Bandpass Filters Using DGS and Stub”, UTK RESEARCH JOURNAL, vol. 12, no. 2, pp. 40–48, Dec. 2018.

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Section

Research Articles