Low phase-delay reflection-type CRLH band-pass-filter

Tamotsu Nishino*, Masaomi Tsuru, Moriyasu Miyazaki

*Corresponding author for this work

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

2 Citations (Scopus)


In this paper, we propose the concept of the reflection-type composite right left handed (CRLH) filter to obtain low phase-delay in pass band. A lumped-element CRLH transmission line has stop bands and pass bands according to its lumped-element values. Therefore, it is a candidate of tunable filter configuration. But in pass band, transmission phase changes very rapidly when the number of unit CRLH cells increases. This is a fatal disadvantage for a communication device. On the other hand, reflection phase does not change so fast. We have realized this reflection property could be transferred to transmission property by combining with a hybrid circuit. Finally, the concept was verified by being implemented on a GaAs substrate. The result showed phase change was less than 90 degrees in 20% bandwidth.

Original languageEnglish
Title of host publicationProceedings of the 36th European Microwave Conference, EuMC 2006
PublisherIEEE Computer Society
Number of pages4
ISBN (Print)2960055160, 9782960055160
Publication statusPublished - 2006
Externally publishedYes
Event36th European Microwave Conference, EuMC 2006 - Manchester, United Kingdom
Duration: 2006 Sept 102006 Sept 12

Publication series

NameProceedings of the 36th European Microwave Conference, EuMC 2006


Conference36th European Microwave Conference, EuMC 2006
Country/TerritoryUnited Kingdom


  • Microwave filters
  • MMICs

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Radiation


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