Results 21 to 30 of about 1,363,250 (192)
A Full-Passband Linear-Phase Band-Pass Filter Equalized With Negative Group Delay Circuits
IEEE Access, 2020 A full-passband linear-phase band-pass filter (BPF) equalized with negative group delay circuits (NGDC) is proposed. The NGDCs are utilized to suppress the salient group delay at the edge of the passband of the traditional BPF for achieving the full ...
Te Shao +4 more
doaj +1 more source
Design of resonant mirrors with negative group delay
Optics Express, 2014 Resonant mirrors introduce large spectral gradients in reflected phase while maintaining high reflectivity, allowing synthesis of optimized reflected phase for many practical applications. In this paper we show theoretically that asymmetry is required for negative group delay in lossless mirrors and explore the limits of reflected phase in resonant ...
Antonio, Gellineau +2 more
openaire +2 more sources
A Compact Dual-Band Differential Negative Group Delay Circuit With Wideband Common Mode Suppression
IEEE Journal of Microwaves, 2022 A compact dual-band differential negative group delay (DNGD) circuit with wideband common mode suppression is proposed. Two small 180° phase shift swap structures of double-sided parallel striplines (DSPS) are adopted to realize intrinsic wideband
Zhongbao Wang +3 more
doaj +1 more source
Broadband Balun Using Active Negative Group Delay Circuit [PDF]
, 2007 International audienceIn this paper, a broadband balun using an active circuit with negative group delay (NGD) is proposed. The unit cell of the active NGD circuit is based on a Field Effect Transistor (FET) in cascade with an RLC series network.
Le Roy, Marc +2 more
core +2 more sources
Analytical Design of Dual-Band Negative Group Delay Circuit With Multi-Coupled Lines
IEEE Access, 2020 This paper develops an innovative design method of a multi-coupled line (CL) topology of low-loss dual band negative group delay (NGD) circuit. The proposed is conceived using three transmission lines (TLs) with different length in which integrate two ...
Xiang Zhou +7 more
doaj +1 more source
Novel Gysel Power Dividers with Negative Group Delay Characteristics
International Journal of Antennas and Propagation, 2019 A novel Gysel power divider with negative group delay (NGD), good matching, and low insertion loss is proposed. Resistors connected with short-circuited coupled lines (RCSCL) are shunted at output ports of the Gysel power divider to obtain NGD ...
Zihui Zhu +5 more
doaj +1 more source
Reconfigurable Negative Group Delay Circuit with a Low Insertion Loss Using a Coupled Line [PDF]
Journal of Electromagnetic Engineering and Science, 2020 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
Girdhari Chaudhary, Yongchae Jeong
doaj +1 more source
Large negative and positive delay of optical pulses in coherently prepared dense Rb vapor with buffer gas [PDF]
, 2004 We experimentally study the group time delay for a light pulse propagating through hot Rb vapor in the presence of a strong coupling field in a $\Lambda$ configuration. We demonstrate that the ultra-slow pulse propagation is transformed into superluminal
A. B. Matsko +11 more
core +3 more sources
A Compact Dual-Band Negative Group Delay Microwave Circuit [PDF]
Radioengineering, 2018 A compact dual-band negative group delay circuit (NGDC) is proposed. The proposed NGDC is composed of an open-circuited transmission line and two resistors connected by two transmission lines.
T. Shao, S. Fang, Z. Wang, H. Liu
doaj
IEEE Access, 2021 This paper focuses on the time-domain analysis of bandpass (BP) negative group delay (NGD) function. The innovative NGD investigation is based on the time-domain experimentation of an innovative topology of “lill”-shape passive microstrip ...
Remy Vauche +7 more
doaj +1 more source