Novel Bandstop Filter With Improved Flat NGD Characteristics and Signal Attenuation in Passband
IEEE AccessA bandstop filter with flat negative group delay (NGD) is proposed. The flatter NGD and reduced insertion loss have been achieved in the passband of the bandstop filter.
Aixia Yuan +5 more
doaj +1 more source
Lossy Coupling Matrix Synthesis Approach for the Realization of Negative Group Delay Response
IEEE Access, 2018 In this paper, a systematic synthesis approach is proposed for achieving negative group delay responses using lossy coupling matrix. It is mathematically proved that, for a passive and reciprocal network, loss is the necessary condition to realize a ...
Ranjan Das, Qingfeng Zhang, Haiwen Liu
doaj +1 more source
Observing 'back to the future' phenomenon with photonic chip [PDF]
, 2008 The possibility to engineer the group velocity $(v_g)$ of light has attracted much attention in the last couple of years. One of the most exotic phenomena in this research field is the negative $v_g$phenomenon.
Hoekstra, H.J.W.M. +3 more
core +1 more source
Design and Test of Crab-Shaped Negative Group Delay Circuit
IEEE Design & Test, 2022 This paper presents the design and the test of distributed planar microwave circuit with crab-shape topology. The circuit topology consists of transmission lines (TLs) associated in feedback with two cascaded coupled lines (CLs). The proposed topology behaves as a bandpass negative group delay (NGD) function.
Ravelo, Blaise +4 more
openaire +2 more sources
Single-mode delay time statistics for scattering by a chaotic cavity [PDF]
, 2000 We investigate the low-frequency dynamics for transmission or reflection of a wave by a cavity with chaotic scattering. We compute the probability distribution of the phase derivative phi'=d phi/d omega of the scattered wave amplitude, known as the ...
Beenakker, C. W. J. +2 more
core +4 more sources
A Planar Implementation of a Negative Group Delay Circuit
The Journal of Korean Institute of Electromagnetic Engineering and Science, 2010 In this paper, a planar structure negative group delay circuit(NGDC) is proposed to overcome the limited availability of the component values required for the prototype lumped element(LE) NGDC design. From the prototype LE circuit analysis, general design equations and the conditions to obtain the NGD are derived and illustrated. Then the LE circuit is
Yong-Chae Jeong +4 more
openaire +2 more sources
A Novel Fully Reconfigurable Non Foster Capacitance Using Distributed Negative Group Delay Networks
IEEE Access, 2019 A novel reconfigurable non-Foster capacitance (NFC) using negative group delay (NGD) circuit is presented in this paper. The NGD circuit is based on a multi-order distributed amplifier which is used to achieve both NGD performance and gain compensation ...
Tiedi Zhang, Tao Yang
doaj +1 more source
Enhanced Bandwidth and Diversity in Real-Time Analog Signal Processing (R-ASP) using Nonuniform C-section Phasers [PDF]
, 2016 We show that a continuously nonuniform coupled line C-section phaser, as the limiting case of the step discontinuous coupled-line multisection commensurate and non-commensurate phasers, provides enhanced bandwidth and diversity in real-time analog signal
Caloz, Christophe +3 more
core +1 more source
IEEE Access, 2022 The miniaturization and application development are the expected challenges on the today engineering design research on bandpass (BP) type negative group delay (NGD) circuit.
Blaise Ravelo +8 more
doaj +1 more source
'Slow'- and 'fast'-light in a single ring-resonator circuit: theory, experimental observations, and sensing applications [PDF]
, 2007 Transfer matrix method (TMM) was used to study the phenomena of ‘slow’- and ‘fast’-light in a single two-port ring-resonator (TPRR) circuit theoretically. Their classifications into ‘slow’- and ‘fast’-light with negative and positive group velocity (v_g),
Hoekstra, H.J.W.M. +3 more
core +1 more source