Transmission‐type negative group delay networks using coupled line doublet structure

2015 ◽  
Vol 9 (8) ◽  
pp. 748-754 ◽  
Author(s):  
Girdhari Chaudhary ◽  
Yongchae Jeong
Keyword(s):  
Group Delay ◽  
Negative Group ◽  
Coupled Line ◽  
Doublet Structure ◽  
Negative Group Delay

scholarly journals Reconfigurable Negative Group Delay Circuit with a Low Insertion Loss Using a Coupled Line

2020 ◽  
Vol 20 (1) ◽  
pp. 73-79
Author(s):  
Girdhari Chaudhary ◽  
Yongchae Jeong
Keyword(s):  
Insertion Loss ◽  
Group Delay ◽  
Characteristic Impedance ◽  
Center Frequency ◽  
Pin Diode ◽  
Negative Group ◽  
Coupled Line ◽  
Coupled Lines ◽  
Low Insertion Loss ◽  
Negative Group Delay

This paper presents a design of a transmissive-type, low insertion loss (IL) negative group delay (NGD) circuit with a reconfigurable NGD. The proposed circuit consists of a series transmission lines (TLs) and shunt short-circuited coupled lines where an isolation port is terminated with a parasitic compensated PIN diode. Analytical design equations are derived to obtain the circuit parameters for the predefined NGD and IL. The low IL can be achieved because of the very high characteristic impedance of the short-circuited coupled lines. The TL terminated with a PIN diode is used to achieve the constant center frequency of reconfigurable NGD circuit. For experimental validation, the NGD circuit is designed and fabricated at a center frequency (<i>f</i><sub>0</sub>) of 2.14 GHz. In the measurement, the NGD varies from -0.5 ns to -2 ns with an IL variation of 2.08 to 3.60 dB at <i>f</i><sub>0</sub> = 2.14 GHz. The NGD bandwidth (bandwidth of GD less than 0 ns) varies from 90 MHz to 50 MHz. The minimum input/output return losses are higher than 10 dB for the overall tuning range.

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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