Theory of coupled line coupler-based negative group delay microwave circuit

B Ravelo - IEEE Transactions on Microwave Theory and …, 2016 - ieeexplore.ieee.org
A fundamental theory of coupled line coupler-based negative group delay (NGD) topology is
established in this paper. The microwave circuit under study consists of the isolated-and …

Original application of stop-band negative group delay microwave passive circuit for two-step stair phase shifter designing

B Ravelo, G Fontgalland, HS Silva, J Nebhen… - IEEE …, 2021 - ieeexplore.ieee.org
This paper investigates on the theorization, design, fabrication and measurement of original
phase shifter (PS) operating with two-step stair phase behavior. The innovative stair PS is …

Design method of constant phase-shifter microwave passive integrated circuit in 130-nm BiCMOS technology with bandpass-type negative group delay

B Ravelo, M Guerin, J Frnda, FE Sahoa… - IEEE …, 2022 - ieeexplore.ieee.org
The miniaturization and application development are the expected challenges on the today
engineering design research on bandpass (BP) type negative group delay (NGD) circuit. To …

Tee power divider and combiner based negative group delay topology

B Ravelo - International Journal of RF and Microwave …, 2018 - Wiley Online Library
An innovative topology of negative group delay (NGD) microwave circuit based on the
interconnected power divider and combiner (PWD/PWC) is investigated. The distributed cell …

S-parameter model of three parallel interconnect lines generating negative group-delay effect

F Wan, N Li, B Ravelo, Q Ji, J Ge - IEEE Access, 2018 - ieeexplore.ieee.org
This paper develops a negative group-delay (NGD) microwave circuit theory regarding
topology consists of three parallel interconnect lines (3-PILs). The NGD topology under …

Negative group-delay phenomenon analysis with distributed parallel interconnect line

B Ravelo - IEEE Transactions on Electromagnetic Compatibility, 2016 - ieeexplore.ieee.org
This paper describes an original theory on negative group-delay (NGD) topology of parallel
interconnect line (PIL). The proposed topology consists of a fully distributed circuit without …

Canonical transfer function of band‐pass NGD circuit

F Wan, L Wang, Q Ji, B Ravelo - IET Circuits, Devices & …, 2019 - Wiley Online Library
This study introduces the generalised canonical transfer function (TF) of the band‐pass
negative group delay (NGD) circuit. The principle to identify the unfamiliar band‐pass NGD …

О принципе причинности и сверхсветовых скоростях распространения сигналов

НС Бухман - Радиотехника и электроника, 2021 - elibrary.ru
Рассмотрен вопрос о сверхсветовых (или отрицательных) групповых скоростях
сигналов в диспергирующих средах, а также об отрицательных временах групповой …

Negative group delay theory on Li topology

B Ravelo, L Wu, F Wan, W Rahajandraibe… - IEEE …, 2020 - ieeexplore.ieee.org
This paper investigates an innovative negative group delay (NGD) theory of “li” geometrical
shape topology. The li-topology is an outstandingly simple and fully distributed circuit …

Compact and wideband flat negative group delay circuit investigation

T Gu, F Wan, J Chen, B Ravelo… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
This brief introduces a dual transmission structure with bandpass (BP) negative group delay
(NGD) wideband flat behavior. The flat BP-NGD topology is analytically modelled from …