Bandstop filter (BSF) topology with variable attenuation

Tae Hak Lee, Kangho Lee, Gyu Churl Park, Young Sik Kim, Juseop Lee

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


In this paper, we provide a new third-order bandstop filter (BSF) topology with attenuation control capability. The proposed BSF topology contains inter-resonator coupling structures and it can duplicate the frequency responses of the conventional BSF topology, which does not have inter-resonator couplings. In addition, the proposed topology can control the attenuation level by adjusting the resonant frequency of each resonator, and this characteristic cannot be obtained from the conventional one. Two BSFs utilizing the conventional and proposed topologies are designed, fabricated, and measured to support the presented theory. Two filters have been designed and fabricated employing frequency tunable substrate integrated cavity resonators. The measurement verifies that the BSF utilizing the presented topology is capable of adjusting the attenuation level as well as reproducing the conventional bandstop responses.

Original languageEnglish
Article number7365500
Pages (from-to)467-474
Number of pages8
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number2
Publication statusPublished - 2016 Feb 1

Bibliographical note

Publisher Copyright:
© 2015 IEEE.


  • Bandstop filter (BSF)
  • Filter synthesis
  • Odd-order filter
  • Reconfigurable filter

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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