scholarly journals S-Parameter Model of Three Parallel Interconnect Lines Generating Negative Group-Delay Effect

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 57152-57159 ◽  
Author(s):  
Fayu Wan ◽  
Ningdong Li ◽  
Blaise Ravelo ◽  
Qizheng Ji ◽  
Junxiang Ge
Keyword(s):  
Group Delay ◽  
Negative Group ◽  
Delay Effect ◽  
S Parameter ◽  
Interconnect Lines ◽  
Negative Group Delay

Negative group delay experimentation with tee connector and cable structures

2020 ◽  
Vol 91 (1) ◽  
pp. 10903
Author(s):  
Fayu Wan ◽  
Xiaoyu Huangi ◽  
Preeti Thakur ◽  
Atul Thakur ◽  
Sébastien Lalléchère ◽  
...  
Keyword(s):  
Figure Of Merit ◽  
Group Delay ◽  
Characteristic Impedance ◽  
Existence Condition ◽  
Proof Of Concept ◽  
Negative Group ◽  
S Parameter ◽  
High Figure ◽  
Good Agreement ◽  
Negative Group Delay

The unfamiliar negative group-delay (NGD) phenomenon is experimented with structure constituted by tee-connectors and coaxial cables. The topology of the NGD generator is described. It consists of two parallel 50-Ω characteristic impedance cables. The S-parameter model in function of the cable physical lengths is established. The existence condition enabling to understand the NGD phenomenon is defined. A proof of concept simply is constituted by two three-port SMA connectors, three SMA transitions and 13-cm length cables. The NGD experimentation is performed from 1.5 GHz to 3.5 GHz. Tri-band NGD aspects in good agreement with the theory and simulation is observed experimentally. Particularly, high figure-of-merit NGD circuit with −3 ns NGD level, less than 2 dB insertion loss and 12 dB return loss around 3 GHz centre frequency is measured.

Electromagnetic Cavity Resonance Equalization With Bandpass Negative Group Delay

2021 ◽  
pp. 1-10
Author(s):  
Blaise Ravelo ◽  
Sebastien Lallechere ◽  
Wenceslas Rahajandraibe ◽  
Fayu Wan
Keyword(s):  
Group Delay ◽  
Cavity Resonance ◽  
Negative Group ◽  
Negative Group Delay

scholarly journals Negative Group Delay Theory on Li Topology

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 47596-47606
Author(s):  
Blaise Ravelo ◽  
Lili Wu ◽  
Fayu Wan ◽  
Wenceslas Rahajandraibe ◽  
Nour Mohammad Murad
Keyword(s):  
Group Delay ◽  
Negative Group ◽  
Negative Group Delay

scholarly journals Design of resonant mirrors with negative group delay

2014 ◽  
Vol 22 (23) ◽  
pp. 29213 ◽  
Author(s):  
Antonio Gellineau ◽  
Yu-Po Wong ◽  
Olav Solgaard
Keyword(s):  
Group Delay ◽  
Negative Group ◽  
Negative Group Delay
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