A tunable non-foster t-network loaded transmission line using distributed amplifier-based reconfigurable negative group delay circuit

Minning Zhu, Chung-Tse Wu

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

6 Scopus citations

Abstract

A novel tunable non-Foster T-network loaded with transmission lines (TLs) using a two-stage distributed amplifier (DA)-based negative group delay (NGD) circuit is proposed. The tunability comes from the NGD response synthesized by adjusting the ratio of the transconductance of the transistors, and the varactors at both the input and output port. Due to the distributed topology, the proposed T-network not only works within a relatively broad band (several hundreds of Mega-Hertz), but also has good input and output matching characteristics. A prototype of the proposed non-Forster T-network is built and tested. By properly amending the in-band magnitude and phase characteristics, the NGD circuit can realize the targeted non-Foster T-network with unconditional stability. The experimental results show that the tunable equivalent T-network has a 0 pF to - 1.5 pF shunt capacitance and a 0 nH to -1.875 nH inductance.

Original languageEnglish (US)
Title of host publication2018 Asia-Pacific Microwave Conference, APMC 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages720-722
Number of pages3
ISBN (Electronic)9784902339451
DOIs
StatePublished - Jan 16 2019
Event30th Asia-Pacific Microwave Conference, APMC 2018 - Kyoto, Japan
Duration: Nov 6 2018Nov 9 2018

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC
Volume2018-November

Conference

Conference30th Asia-Pacific Microwave Conference, APMC 2018
CountryJapan
CityKyoto
Period11/6/1811/9/18

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Distributed amplifier
  • Negaive capacitor
  • Negative group delay
  • Negative inductor
  • Non-Foster elements

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