Reconfigurable Bandpass Filter with Resonators in Cul-De-Sacs for Producing Notches

Seunggoo Nam, Boyoung Lee, Beyoungyoun Koh, Juseop Lee

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We present a new design method for bandpass filters capable of adjusting center frequencies, bandwidths, and notches. For designing such filters, filter topologies employing frequency-tunable resonators in cul-de-sacs are developed. The cul-de-sac resonators are mainly responsible for constructing notches, while the resonators in main paths form passbands. For verifying the presented design method, we have designed two bandpass filters. Each filter consists of two different resonator types: microstrip-line resonators for forming passbands and substrate-integrated waveguide resonators for producing notches. The measured results of the two designed filters show that frequency-tunable notches can be placed next to the passbands without producing unwanted resonant peaks that are usually observed in bandpass-bandstop filter cascades. This indicates that the filters designed using the presented topologies can replace bandpass-bandstop filter cascades.

Original languageEnglish
Article number7917351
Pages (from-to)1531-1542
Number of pages12
JournalIEEE Transactions on Components, Packaging and Manufacturing Technology
Issue number9
Publication statusPublished - 2017 Sept

Bibliographical note

Funding Information:
This work was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT, and Future Planning under Grant NRF-2015R1C1A1A02036754.

Publisher Copyright:
© 2011-2012 IEEE.


  • Bandpass filter
  • bandstop filter
  • microstrip line
  • substrate-integrated waveguide (SIW)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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