Compact Wideband Bandstop Filter With Directly Controlled Rejection

Liang Liu, Xianling Liang, Haijun Fan, Ronghong Jin, Xudong Bai, Junping Geng

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Abstract

This brief presented a wideband bandstop filter (WBBSF) with compact size and five transmission zeros, which is based on a symmetrical three-layer ring structure comprising equivalently high-impedance phase-shift section, coupled lines, and short-stubs. The WBBSF based on multi-mode resonators can be directly synthesized from the desired rejection, and its transmission zeros and bandwidth are controlled by only two characteristic impedances. For validation, the calculations, simulations, and measurements have also been done for wideband bandstop filter. Good agreements among the calculated, simulated, and measured results are observed.

Original languageEnglish
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Early online date6 Jan 2021
DOIs
Publication statusE-pub ahead of print - 6 Jan 2021

Keywords

  • Coupled stub-loaded resonator
  • Couplings
  • directly controlled rejection
  • Equivalent circuits
  • equivalently high-impedance phase-shift section
  • Filtering theory
  • Impedance
  • odd-and even-mode analysis
  • Resonators
  • Shunts (electrical)
  • Wideband
  • wideband bandstop filter.

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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