New bandstop filter circuit topology and its application to design of a bandstop-to-bandpass switchable filter

Juseop Lee, Eric J. Naglich, Hjalti H. Sigmarsson, Dimitrios Peroulis, William J. Chappell

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

In this paper, we show a new bandstop filter circuit topology. Unlike conventional bandstop filter circuit topologies, the new circuit topology has inter-resonator coupling structures. The presence of these inter-resonator coupling structures enables convenient switching from a bandstop to a bandpass filter. Using the new bandstop filter topology, this paper demonstrates a design of a frequency-agile bandstop-to-bandpass switchable filter. The filter is composed of tunable substrate-integrated cavity resonators and can be switched to have either a bandstop or bandpass response. Switching is achieved by turning on and off switches placed within the filter structure. A prototype of the proposed design is fabricated and the concept is verified experimentally.

Original languageEnglish
Article number6409480
Pages (from-to)1114-1123
Number of pages10
JournalIEEE Transactions on Microwave Theory and Techniques
Volume61
Issue number3
DOIs
Publication statusPublished - 2013

Keywords

  • Bandpass filter
  • bandstop filter
  • filter synthesis
  • resonator filter

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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