Bandpass Negative Group Delay Analysis of VIuShaped Trace Crosstalk Effect

This paper investigates on the bandpass (BP) negative group delay (NGD) effect from printed circuit board (PCB) trace crosstalk. The designed and prototyped PCB proof-of-concept (POC) is constituted by arbitrary traces of Vlu-shaped coupled lines ended by radial open stubs. The BP-NGD function is characterized by the basic qualification parameters as the NGD value, center frequency and bandwidth. The influence of the u- and V-shape trace physical parameters on the main interconnect I-line is illustrated by sensitivity analyses. The Vlu POC BP-NGD behavior is validated by simulation and measurement. The BP NGD analysis reveals the PCB trace crosstalk effect with the apparition of dual-band response characterized by NGD value-center frequencies of about (-1 ns, 2.43 GHz) and (-1 ns, 2.58 GHz).