Journal ArticleDOI
Similitude between the NGD function and filter gain behaviours
TLDR
The introduced transform relationships simplify the synthesis of any NGD circuits from simple elementary low-pass NGD topologies, and the possibility of the ultra-wideband pulse signals propagating in time-advance is verified.Abstract:
This paper deals with the similitude between the behaviours of linear filter gain and negative group delay NGD function. The transposition method of low-pass/high-pass, low-pass/band-pass and low-pass/band-stop NGD circuits is established. To the best of the author knowledge, it acts as the first paper devoted on the NGD function generalized theory. The introduced transform relationships simplify the synthesis of any NGD circuits from simple elementary low-pass NGD topologies. Families of innovative NGD topologies are identified. To verify the relevance of the concept proposed, frequency- and time-domain analysis results from realistic proofs of concept demonstrating the feasibility of developed NGD transforms were performed. Thanks to the NGD phenomenon, the possibility of the ultra-wideband pulse signals propagating in time-advance is verified. Finally, potential applications of NGD circuits are discussed. Copyright © 2013 John Wiley & Sons, Ltd.read more
Citations
More filters
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
First-order low-pass negative group delay passive topology
TL;DR: In this paper, an innovative theory on the passive circuits capable of generating low-pass negative group delay (NGD) behavior is introduced. And an identification method enabling to identify the first-order NGD simple cells built with resistor-inductor (RL)- and resistor-capacitor (RC)-networks is elaborated.
Journal ArticleDOI
Theory and circuit modeling of baseband and modulated signal delay compensations with low- and band-pass NGD effects
TL;DR: In this paper, the authors proposed a correction technique based on the use of the negative group delay (NGD) circuits, which can compensate the signal delay in baseband frequency up to hundreds MHz with low-pass NGD circuit and 2.45 GHz modulated microwave signals with band-pass ND circuit.
Journal ArticleDOI
Distributed NGD active circuit for RF-microwave communication
TL;DR: In this paper, a distributed negative group delay (DNGD) circuit for RF communication is presented, which is mainly comprised of a transistor combined with a series resistance ended by a stub.
References
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Nicholas X. Fang,Dongjuan Xi,Jianyi Xu,Muralidhar Ambati,Werayut Srituravanich,Cheng Sun,Xiang Zhang +6 more
TL;DR: A new class of ultrasonic metamaterials consisting of an array of subwavelength Helmholtz resonators with designed acoustic inductance and capacitance with an effective dynamic modulus with negative values near the resonance frequency is reported.
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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.