Tunable high quality-factor absorptive bandstop filter design

Trevor Snow, Juseop Lee, William J. Chappell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

44 Citations (Scopus)


A two-pole, substrate-integrated, high quality(Q)-factor absorptive bandstop filter is demonstrated that exhibits enhanced selectivity over traditional reflective bandstop filter designs and higher Q-factor components than previous absorptive designs. With a Q-factor of 729, the presented filter has a peak isolation of 30 dB, a narrow 10-dB rejection bandwidth of 3.9 MHz that is tunable over 3.4-3.8 GHz, and an out-ofband insertion loss of 0.3 dB, exhibiting the same attenuation of a standard two-pole reflective notch filter with a Q-factor of 3100. These features enable channel-select isolation of high power interfering signals from closely separated receive bands without impacting receiver noise figure.

Original languageEnglish
Title of host publicationIMS 2012 - 2012 IEEE MTT-S International Microwave Symposium
Publication statusPublished - 2012
Externally publishedYes
Event2012 IEEE MTT-S International Microwave Symposium, IMS 2012 - Montreal, QC, Canada
Duration: 2012 Jun 172012 Jun 22

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X


Other2012 IEEE MTT-S International Microwave Symposium, IMS 2012
CityMontreal, QC


  • Cavity resonators
  • Filters
  • Microwave filters
  • Piezoelectric actuators
  • Tunable circuits

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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