Design of a compact dual-band folded-waveguide bandpass filter using multilayer waveguide resonators

Sultan Almorqi, Hussein Shaman, Jia-Sheng Hong, Osama M. Haraz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


A novel compact dual-band bandpass filter based on multilayer folded-waveguide (FWG) structure is presented in this article.In this design, slots are used to realize direct coupling between adjacent resonators and apertures are adopted to implement cross coupling between non-adjacent resonators.A new technique of external quality factor of FWG resonator and coupling coefficients between different resonators are studied using full-wave simulator. In order to demonstrate the proposed technique, a four-pole dual-band bandpass filter is designed, fabricated and measured using vector network analyzer. Measurement results which are well agreed with simulation results are presented. Moreover, four-pole substrate integrated folded waveguide SIFW dual-band bandpass filter, using two layers of slotted folded waveguide resonators, is demonstrated. The proposed filter has a compact size and it is excellent candidate for the application of wireless communication systems.

Original languageEnglish
Pages (from-to)780-788
Number of pages9
JournalInternational Journal of RF and Microwave Computer-Aided Engineering
Issue number9
Publication statusPublished - Nov 2015


  • folded-waveguide resonators
  • microwave filters
  • dual passband filter
  • SIFW


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