A dual-purpose reconfigurable negative group delay circuit based on distributed amplifiers

Chung Tse Michael Wu, Sam Gharavi, Babak Daneshrad, Tatsuo Itoh

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


In this letter, a novel reconfigurable negative group delay distributed amplifier (NGD-DA) circuit is proposed. This NGD-DA offers a new method to realize negative group delay. By properly choosing the gain coefficient of each tap for the DA, we can synthesize the negative group delay at the reverse port of the DA in the frequency band of interest, while maintaining a flat gain at the forward port; this results in a dual-purpose DA. Moreover, the proposed NGD-DA is reconfigurable; the phase response at the reverse port can be simply controlled by adjusting the tap gain coefficients, and therefore the bandwidth as well as the amount of negative group delay can be manipulated. The proposed active NGD circuit is validated through theoretical explanation and experimental results.

Original languageEnglish (US)
Article number6589179
Pages (from-to)593-595
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number11
StatePublished - 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


  • Dispersion engineering
  • distributed amplifier (DA)
  • dynamic power supply
  • negative group delay (NGD)
  • superluminal group velocity
  • transversal filter


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