Lossy Dual-Mode Bandpass Filter with Non-Uniform Q Method

Hongliang Guo, Jia Ni, Jiasheng Hong, Petronilo Martin Iglesias

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


This paper presents a recent investigation of dual-mode microstrip filter with non-resonating nodes and nonuniform Q lossy technique. By utilizing the dual-path and dual-mode property of dual-mode open-loop resonator, non-uniform Q distribution is deployed for passband flatness improvement. As there is no coupling between even-mode and odd-mode, the odd-mode Q-factor can be properly reduced by loading resistors over the symmetric plane of each resonators. The coupling matrix analysis are described. Design of this type of 4-pole dual-mode bandpass filter is demonstrated experimentally.

Original languageEnglish
Title of host publication2018 48th European Microwave Conference (EuMC)
Number of pages4
ISBN (Electronic)9782874870514
Publication statusPublished - 22 Nov 2018
Event48th European Microwave Conference 2018 - Madrid, Spain
Duration: 25 Sep 201827 Sep 2018


Conference48th European Microwave Conference 2018
Abbreviated titleEuMC 2018


  • Dual-mode resonators
  • Microstrip filters
  • Nonuniform Q-factor

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Instrumentation
  • Radiation

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