Results 221 to 230 of about 446,810 (257)

Dielectric Resonator Negative Group Delay Circuit

Radio Science, 2021
AbstractThis study investigates an innovative theory on design of dielectric resonator (DR) based negative group delay (NGD) microwave circuit. The NGD circuit is mainly constituted by a cylindrical bulk of DR as a coupling element with a microstrip line. The developed theory is analytically established from the S‐parameters modeling of this innovative
Gu, Taochen, Wan, Fayu, Thakur, Preeti, Thakur, Atul, Lalléchère, Sébastien, Rahajandraibe, Wenceslas, Ravelo, Blaise   +6 more
openaire   +2 more sources

Superluminal effects and negative group delays in electronics, and their applications

Physical Review E, 2002
The 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
openaire   +2 more sources

A Broadband Dual‐Band Negative Group Delay Circuit With Flat Group Delay

International Journal of Circuit Theory and Applications
ABSTRACTA 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, Aixia Yuan, Zhenping Lan, Xianying Xu   +3 more
openaire   +1 more source

Engineered group delay transmission lines based on novel negative group delay networks

Loughborough Antennas & Propagation Conference (LAPC 2017), 2017
Zero 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
openaire   +1 more source

Systematic design of negative group delay circuits

AEU - International Journal of Electronics and Communications
Costas Psychalinos, Brent Maundy, Ahmed S Elwakil   +2 more
exaly   +2 more sources

Investigation on Microwave Negative Group Delay Circuit

Electromagnetics, 2011
Abstract In this article, a fundamental analytical approach and experimental verification of a radio frequency active circuit capable of exhibiting negative group delay at microwave wavelengths are presented. By using the S-parameter theory, basic properties and characteristics of the negative group delay circuit under study are established.
Blaise Ravelo
exaly   +2 more sources

Synthesis of negative group delay time circuit

2008 Asia-Pacific Microwave Conference, 2008
In 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, null Kyungju Song, null Chul Dong Kim, null Yongchae Jeong   +3 more
openaire   +1 more source

Reduction Technique of Differential Propagation Delay with Negative Group Delay Function

2020 14th European Conference on Antennas and Propagation (EuCAP), 2020
This 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, Ningdong Li, Wenceslas Rahajandraibe, Blaise Ravelo   +3 more
openaire   +1 more source

Millimeter-wave negative group delay network

2016 URSI Asia-Pacific Radio Science Conference (URSI AP-RASC), 2016
This 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, Stephen M. Hanham, Norbert Klein, Stepan Lucyszyn   +3 more
openaire   +1 more source

ANovel Dual-Band Negative Group Delay Microwave Circuit

2019 IEEE Radio and Wireless Symposium (RWS), 2019
A novel 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. The frequency ratio can be controlled by the characteristic impedance of the transmission lines.
Te Shao, Shaojun Fang, Zhongbao Wang, Hongmei Liu 0007, Shiqiang Fu   +4 more
openaire   +1 more source