Negative group delay circuit based on a multisection asymmetrical directional coupler

Chung Tse Michael Wu, Sam Gharavi, Tatsuo Itoh

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

8 Scopus citations


In this paper, we present a novel passive negative group delay (NGD) circuit based on directional couplers. By cascading several directional couplers with appropriate coupling coefficients, we are able to synthesize negative group delay with a broad bandwidth at the coupled port of the multisection directional coupler. Unlike conventional NGD circuits that use bandstop structures with lumped elements, such as inductors and capacitors, to realize negative group delay, the proposed design provides a fully distributed realization of NGD circuit. Therefore, this novel NGD circuit is very promising to be integrated into high frequency designs.

Original languageEnglish (US)
Title of host publication2013 Asia-Pacific Microwave Conference Proceedings, APMC 2013
Number of pages2
StatePublished - 2013
Externally publishedYes
Event2013 3rd Asia-Pacific Microwave Conference, APMC 2013 - Seoul, Korea, Republic of
Duration: Nov 5 2013Nov 8 2013

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC


Other2013 3rd Asia-Pacific Microwave Conference, APMC 2013
Country/TerritoryKorea, Republic of

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


  • Anomalous dispersion
  • directional couplers
  • dispersion engineering
  • negative group delay
  • transversal filters


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