Miniaturized dual-band microstrip bandpass filter with wide stopband

Shang Ru Wu, Yu Hsiang Tseng, Wen Hua Tu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


This paper presents a compact, wide-stopband, and dual-band microstrip bandpass filter using stub-loaded stepped-impedance resonators (SLSIRs). The resonators consist of three stepped-impedance sections. By adjusting the parameters of the resonator, one can control the frequencies of the resonant modes as well as those of the transmission zeros. When the transmission zero frequency is close to the spurious resonant mode frequency, one can have a wide-stopband bandpass filter without any external circuits or increasing the resonator for suppressing the spurious passbands. To validate the design concept, a dual-band bandpass filter is designed, fabricated, and tested.

Original languageEnglish
Title of host publicationIMS 2012 - 2012 IEEE MTT-S International Microwave Symposium
StatePublished - 2012
Event2012 IEEE MTT-S International Microwave Symposium, IMS 2012 - Montreal, QC, Canada
Duration: 17 Jun 201222 Jun 2012

Publication series

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


Conference2012 IEEE MTT-S International Microwave Symposium, IMS 2012
CityMontreal, QC


  • Dual-band bandpass filter
  • Wide stopband


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