Compact ultra-wideband bandpass filter using defected structures ground

J. K. Lee, Young Sik Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this letter, a compact ultra-wideband (UWB) bandpass filter (BPF) is presented with improved upper stopband performance using six defected ground structures (DGS). The proposed BPF is composed of seven DGSs which are positioned under the input and output microstrip line and coupled double step impedance resonator (CDSIR). By using CDSIR and open loop defected ground structure (OLDGS), we can achieve UWB BPF characteristics, and by using the conventional DGSs under input and output microstrip line, we can improve upper stopband performance. Simulated and measured results are found in good agreement with each other, showing a wide passband from 3.4 to 10.9 GHz, minimum insertion loss of 0.61 dB at 7.02 GHz and the group delay variation is less than 0.4 ns in the operating band while wide upper stopband with more than 30 dB attenuation up to 20 GHz. In addition, the proposed UWB BPF has a compact size.

Original languageEnglish
Pages (from-to)2173-2175
Number of pages3
JournalMicrowave and Optical Technology Letters
Volume52
Issue number10
DOIs
Publication statusPublished - 2010 Oct 1

Fingerprint

Defected ground structures
Bandpass filters
bandpass filters
Ultra-wideband (UWB)
broadband
Microstrip lines
Resonators
resonators
impedance
Group delay
output
Insertion losses
insertion loss
attenuation

Keywords

  • Bandpass filter
  • Defected ground structure
  • Ultra-wideband

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Compact ultra-wideband bandpass filter using defected structures ground. / Lee, J. K.; Kim, Young Sik.

In: Microwave and Optical Technology Letters, Vol. 52, No. 10, 01.10.2010, p. 2173-2175.

Research output: Contribution to journalArticle

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