Design of low-pass filters using some defected ground structures

A. K. Verma, Ashwani Kumar*

*Corresponding author for this work

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We present characteristics of seven types of simple and complex defected ground structures (DGS) slot to realize the quasi-lumped inductance. A simple DGS follows the Butterworth type response; whereas a complex DGS has quasi-elliptic response. The response of DGS has strong influence on the performance of a 5-pole Chebyshev type low-pass filter (LPF). We present a systematic design process to realize the LPF using these DGS slots. The 5-pole open square (OS) DGS based LPF of cut-off frequency 2.5 GHz provides best measured performances-transition region bandwidth 0.53 GHz, 20 dB rejection band-width 14.7 GHz, insertion loss 1.29 dB. Theses performances are better than the reported results of the 5-pole DGS based LPF in literature.

Original languageEnglish
Pages (from-to)864-872
Number of pages9
JournalAEU - International Journal of Electronics and Communications
Volume65
Issue number10
DOIs
Publication statusPublished - Oct 2011
Externally publishedYes

Keywords

  • Defected ground structure (DGS)
  • Low-pass filter
  • Microstrip
  • Planar filter

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