Novel planar, square-shaped, dielectric-waveguide, single-, and dual-mode filters

Chi-Yang Chang*, Wei Chen Hsu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

60 Scopus citations


This paper presents a novel concept of a square-shaped dielectric-waveguide resonator, which can easily realize a dielectric-waveguide cross-coupled filter or a dielectric-waveguide dual-mode filter, using the conventional printed circuit board (PCB) process. This planar dielectric-waveguide resonator has a higher Q value than a microstrip resonator. The physical mechanisms of both single- and dual-mode filters are elucidated. Some new coupling structures are developed for undergoing the PCB process. Filter design procedures are detailed. Design curves for the coupling coefficients of internal- and external-coupling structures are determined by full-wave finite-element-method electromagnetic calculations. Measurement results are highly consistent with theory for all trial filters. This study offers an effective means of producing low-cost high-performance planar circuit filters.

Original languageEnglish
Pages (from-to)2527-2536
Number of pages10
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number11 SPEC
StatePublished - 1 Nov 2002


  • Cross-coupled filter
  • Dielectric-waveguide filter
  • Printed circuit board (PCB) filter
  • Square-shaped waveguide resonator
  • Waveguide single- and dual-mode filter

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