Results 161 to 170 of about 1,363,250 (192)
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A delayed-feedback filter with negative group delay
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2018A filter with delay-induced negative group delay is presented. The filter consists of multiple time-delayed feedback terms, which lead to a negative group delay for frequencies in the baseband. It can be used for the real-time prediction of band-limited signals. The filter is universal as it does not rely on a specific model of the signal. Specifically,
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Superluminal effects and negative group delays in electronics, and their applications
Physical Review E, 2002The causality principle does not forbid negative group delays of analytic signals in electronic circuits; in particular, the peak of a pulse can leave the exit port of a circuit before it enters the input port. Furthermore, pulse distortion for these "superluminal" analytic signals can be negligible in both the optical and electronic domains.
Daniel, Solli, R Y, Chiao, J M, Hickmann
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Design of ₌׀₌ Shape Stub-Based Negative Group Delay Circuit
IEEE Design & Test, 2021Editor’s note: This article presents a type of negative group delay (NGD) circuit based on transmission line resonators. To obtain the circuit’s S-parameters, this article uses a combination of ABCD and Z-parameters. Analytical design equations are presented, which are verified using circuit simulations.
Fayu Wan +4 more
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Synthesis of negative group delay time circuit
2008 Asia-Pacific Microwave Conference, 2008In this work, mathematical analysis and synthesis procedure on the negative group delay circuit has been presented with experimental results. Although broadband can be achieved with the proposed circuit, the work of increasing the amount of negative group delay time is still remained as a future work.
null Heungjae Choi +3 more
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Engineered group delay transmission lines based on novel negative group delay networks
Loughborough Antennas & Propagation Conference (LAPC 2017), 2017Zero group delay performance over wide frequency bands is a prominent issue in wireless communication systems. Negative Group Delay (NGD) networks with the ability to produce positive phase variation with frequency, are proposed here as a promising solution. The principle and procedure for achieving -1O flat phase over 1.5-2.5GHz band using NGD network
T. Thatapudi, P. Gardner, A. Feresidis
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Reduction Technique of Differential Propagation Delay with Negative Group Delay Function
2020 14th European Conference on Antennas and Propagation (EuCAP), 2020This paper deals with an innovative technique of propagation delay reduction. The technique is based on the use of bandpass negative group delay (NGD) function. The principle of the propagation delay reduction is introduced by considering a simple scenario of Tx multi-wireless sensors communicating with a single Rx sensor.
Fayu Wan +3 more
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A Broadband Dual‐Band Negative Group Delay Circuit With Flat Group Delay
International Journal of Circuit Theory and ApplicationsABSTRACTA broadband dual‐band negative group delay circuit (NGDC) with flat group delay is proposed. Without the cascade structure, the proposed NGDC consists of an open‐circuited coupled lines connected with a resistor through transmission lines and a matching network.
Yuwei Meng +3 more
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Millimeter-wave negative group delay network
2016 URSI Asia-Pacific Radio Science Conference (URSI AP-RASC), 2016This paper describes a negative differential-phase group delay network operating at millimeter-wave frequencies, which can be used to compensate for frequency variations in group delay that may otherwise cause signal distortion. This approach utilizes a defect waveguide with a high Q-factor defect cavity resonator, realized with a high-resistivity ...
William J. Otter +3 more
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High-Pass Negative Group Delay RC-Network Impedance
IEEE Transactions on Circuits and Systems II: Express Briefs, 2017This brief describes a synthesis of high-pass negative group delay (NGD) network impedance. The fundamental expression of the high-pass NGD canonical transfer function is established. Based on the circuit impedance equivalent principle, the high-pass NGD first-order network that is constituted by RC lumped elements is identified.
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On Digital Systems with Negative Group Delay
Frequenz, 1993Utz Martin, Hans Wilhelm Schüßler
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