Journal ArticleDOI
Negative Group-Delay Phenomenon Analysis With Distributed Parallel Interconnect Line
TLDR
In this paper, an original theory on negative group-delay (NGD) topology of parallel interconnect line (PIL) was described, which consists of a fully distributed circuit without lossy lumped components.Abstract:
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 lossy lumped components. The PIL voltage transfer function (VTF) is derived from the equivalent transfer matrix. Then, the frequency-dependent expressions of the PIL VTF gain and group delay are extracted. It is shown that the NGD phenomenon can be generated when the PIL is lossy and presenting different electrical lengths. The fundamental NGD properties versus the PIL parameters are established. This NGD concept was validated with implemented two microstrip PIL circuits. The theoretical and measured group-delay behaviors are well correlated. As expected theoretically, the demonstrator with identical 50-Ω characteristic impedance enables to generate NGD of about −4 ns at 1.75 GHz under −5-dB attenuation. Similarly, an −2.1-ns NGD level at 1.99 GHz was occurred with the other 50 Ω/117 Ω characteristic impedances NGD circuit under only −2.5-dB attenuation loss. The NGD function can be potentially used for the microwave signal integrity improvement.read more
Citations
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Journal ArticleDOI
Theory of Coupled Line Coupler-Based Negative Group Delay Microwave Circuit
TL;DR: In this article, a fundamental theory of coupled line coupler-based negative group delay (NGD) topology is established, which consists of the isolated-and coupled-accesses connected in a feedback loop through a lossy interconnect line.
Journal ArticleDOI
A Negative Group Delay Microwave Circuit Based on Signal Interference Techniques
TL;DR: In this article, a self-matched negative group delay (NGD) microwave circuit based on the signal interference technique is proposed to eliminate the performance degradation due to the temperature-dependent resistance variation.
Journal ArticleDOI
S-Parameter Model of Three Parallel Interconnect Lines Generating Negative Group-Delay Effect
TL;DR: A negative group-delay (NGD) microwave circuit theory regarding topology consists of three parallel interconnect lines (3-PILs) and it is shown that the simulated and measured group-delays are well-correlated.
Journal ArticleDOI
O=O Shape Low-Loss Negative Group Delay Microstrip Circuit
TL;DR: This brief deals with an innovative design of negative group delay (NGD) topology presenting O=O geometrical shape composed of a power divider, power combiner and coupled line built with lossy and delayed transmission lines (TLs).
References
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Journal ArticleDOI
Signal Delay in RC Tree Networks
TL;DR: Upper and lower bounds for delay that are computationally simple are presented in this paper and can be used to bound the delay, given the signal threshold, and to certify that a circuit is "fast enough," given both the maximum delay and the voltage threshold.
Journal ArticleDOI
Linear Pulse Propagation in an Absorbing Medium
Steven Chu,S. Wong +1 more
TL;DR: In this paper, the pulse velocity in the linear regime in samples of GaP: N with a laser tuned to the bound $A$-exciton line is measured with use of a picosecond time-of-flight technique.
Proceedings ArticleDOI
A robust method for speech signal time-delay estimation in reverberant rooms
TL;DR: An alternative approach is detailed which reformulates the problem as a linear regression of phase data and then estimates the time-delay through minimization of a robust statistical error measure and is shown to be less susceptible to room reverberation effects.
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