Innovative Transient Study of Tri-Bandpass Negative Group Delay Applied to Microstrip Barcode-Circuit

• Published in: IEEE access Vol. 9; pp. 115030 - 115041
• Main Authors: Wu, Lili, Wan, Fayu, Mefteh, Rym Assila Belhadj, Vauche, Remy, Chan, George, Zhou, Xiang, Haddad, Fayrouz, Rahajandraibe, Wenceslas, Ravelo, Blaise
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Bandpass; bandpass (BP) negative group delay (NGD); Bandwidths; Bar codes; barcode topology; Carrier frequencies; Circuits; Coupled lines (CLs); distributed circuit; Engineering Sciences; Experimentation; Group delay; microwave circuit; Microwave circuits; Microwave communication; Microwave filters; Microwave measurement; Microwave transistors; modelling method; Parameterization; Pulse generators; time-domain experimentation; Topology; Transient analysis; Ultrawideband
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2021.3105040

A transient study of bandpass (BP) negative group delay (NGD) function is devoted in this paper. The transient analysis is applied to an original topology of NGD barcode-shape microstrip circuit. The performed investigation explains how to realize the transient analysis of tri-band NGD circuit. The time-domain (TD) parametrization of the test is established from the BP-NGD specifications of the circuit under test (CUT) based on the S-parameter model. The input signal is a Gaussian pulse characterized in function of the NGD bandwidth (BW) and center frequency. The feasibility of the BP-NGD transient study is illustrated with experimentation based on ultra-wide band (UWB) pulse generator. As proof-of-concept, barcode NGD circuit exhibiting tri-band NGD value-center frequency-bandwidth, (−5.9 ns, 2.128 GHz, 20 MHz), (−7.4 ns, 2.3 GHz, 14 MHz) and (−4.8 ns, 2.42 GHz, 14 MHz) has been fabricated and tested. The transient simulations and experiences confirm that the output signal envelopes of the barcode NGD prototype present leading and tailing edges in time-advance of input ones when the carrier frequency is set equal to the NGD center frequency.