Design of sharp roll-off lowpass filter with ultra wide stopband

Gholamreza Karimi, Ali Lalbakhsh, Hesam Siahkamari

Research output: Contribution to journalArticle

59 Citations (Scopus)


A novel microstrip lowpass filter is proposed to achieve an ultra wide stopband with 12th harmonic suppression and extremely sharp skirt characteristics. The transition band is from 1.26 to 1.37 GHz with -3 and -20 dB, respectively. The operating mechanism of the filter is investigated based on proposed equivalent-circuit model, and the role of each section in creating null points is theoretically discussed. An overall good agreement between measured and simulated results is observed.

Original languageEnglish
Article number6515700
Pages (from-to)303-305
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number6
Publication statusPublished - 2013
Externally publishedYes


  • Micriostrip lowpass filter (LPF)
  • sharp roll-off
  • ultra wide stopband

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