Microstrip lines on annular-ring photonic bandgap structures

Nemai C. Karmakar, Mohammad N. Mollah

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8 Citations (Scopus)


With the advent of planar photonic bandgap (PBG) materials, different topologies of PBG structures have been proposed to improve the bandgap performances of microwave signals. Conventional circular-patterned PBGs have constraints in the broadband stopband performance due to the high ripple heights in S-parameters. In this paper, we suggest a novel annular-ring-patterned PBG to improve the stopband bandwidth and the ripples. The aspect ratio of the annular-ring-patterned PBG plays an important role in controlling the bandwidth of the rejection band, as well as the ripple heights in the S-parameters of the PBG-engineered transmission lines.

Original languageEnglish
Pages (from-to)431-433
Number of pages3
JournalMicrowave and Optical Technology Letters
Issue number6
Publication statusPublished - 20 Mar 2002
Externally publishedYes


  • Annular-ring PBG
  • Filters
  • Microstrip lines
  • Photonic bandgap
  • Ripples
  • Stopband

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