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Miniaturized dual-band bandpass filter using quarter-wavelength stepped-impedance resonators

  • Li Gao*
  • , Xiu Yin Zhang
  • , Kai Xu Wang
  • , Bin Jie Hu
  • *Corresponding author for this work
  • South China University of Technology
  • City University of Hong Kong

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

Abstract

In this paper, we present a novel dual-band miniaturized bandpass filter. The quarter-wavelength stepped impedance resonators are used to generate dual-band response. For circuit size reduction, the resonators are folded and coupled by a parallel microstrip line. Four transmission zeros are created near the passband, resulting high selectivity. The area of the filter is only 6.7 mm × 7.7 mm (0.098λg ×0.11λg), where λg is the guided wavelength at the operating frequency of 2.35GHz. For demonstration, a dual-band BPF have been implemented. Comparisons of the measured and simulated results are presented to verify the theoretical predications.

Original languageEnglish
Title of host publication2012 Asia-Pacific Microwave Conference, APMC 2012 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages238-240
Number of pages3
ISBN (Print)9781457713309
DOIs
StatePublished - 2012
Externally publishedYes
Event2012 Asia-Pacific Microwave Conference, APMC 2012 - Kaohsiung, Taiwan, Province of China
Duration: 4 Dec 20127 Dec 2012

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC

Conference

Conference2012 Asia-Pacific Microwave Conference, APMC 2012
Country/TerritoryTaiwan, Province of China
CityKaohsiung
Period4/12/127/12/12

Keywords

  • dual-band bandpass filter
  • miniaturized
  • quarter-wavelength resonators
  • stepped-impedance resonators

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