Novel diplexer synthesis using the composite right/left-handed phase-advance/delay lines

Pei-Ling Chi*, Tatsuo Itoh

*Corresponding author for this work

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

8 Scopus citations

Abstract

A novel and simple approach for diplexer synthesis using the composite right/left-handed (CRLH) phase-advance/delay lines combined with a coupler is proposed. By engineering CRLH-based transmission lines with desired phase responses at two arbitrary frequencies of interest, the connected CRLH 90° or 180° coupler is excited in a manner such that signals at designated frequencies are separated to the corresponding output ports of coupler. Based on the present configuration, design complexities such as optimization of the interconnection junctions and the harmonic spurious suppression involved in conventional filter-based diplexers can be avoided. In addition, channel isolation is beneficially achieved from the isolation property of directional couplers. The measured insertion loss and isolation are less than 1 dB and better than 20 dB in dual bands respectively. Good agreement was observed between simulation and measurement.

Original languageEnglish
Title of host publicationIMS 2009 - 2009 IEEE MTT-S International Microwave Symposium Digest
Pages117-120
Number of pages4
DOIs
StatePublished - 1 Dec 2009
Event2009 IEEE MTT-S International Microwave Symposium, IMS 2009 - Boston, MA, United States
Duration: 7 Jun 200912 Jun 2009

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X

Conference

Conference2009 IEEE MTT-S International Microwave Symposium, IMS 2009
CountryUnited States
CityBoston, MA
Period7/06/0912/06/09

Keywords

  • Composite right/left-handed (CRLH)
  • Diplexers
  • Directional couplers
  • Phase-advance/delay lines

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    Chi, P-L., & Itoh, T. (2009). Novel diplexer synthesis using the composite right/left-handed phase-advance/delay lines. In IMS 2009 - 2009 IEEE MTT-S International Microwave Symposium Digest (pp. 117-120). [5165646] (IEEE MTT-S International Microwave Symposium Digest). https://doi.org/10.1109/MWSYM.2009.5165646