Compact and high-isolation microstrip quadruplexer

Shih Shan Lo, Ko Wen Hsu, Wen Hua Tu

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

7 Scopus citations


A microstrip quadruplexer with high isolation and compact size is proposed. The quadruplexer utilizes multimode resonators (MMRs), stepped-impedance resonators, and distributed coupling technique. In this proposed quadruplexer, the first and third passbands are excited in the odd modes of MMR, and the second and fourth passbands are of even modes of MMR. Then, with transmission zeros controlled, one can improve isolation. The quadruplexer occupies only a small area of 0.049λ02, and the isolation is better than 31 dB.

Original languageEnglish
Title of host publication2013 Asia-Pacific Microwave Conference Proceedings, APMC 2013
Number of pages3
StatePublished - 2013
Event2013 3rd Asia-Pacific Microwave Conference, APMC 2013 - Seoul, Korea, Republic of
Duration: 5 Nov 20138 Nov 2013

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC


Conference2013 3rd Asia-Pacific Microwave Conference, APMC 2013
Country/TerritoryKorea, Republic of


  • Isolation
  • multi-mode resonator
  • multiplexer


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