Ultrashort pulse excitation in circuit ground of a modal filter on a double-sided printed circuit board: Crosstalk along conductors

DOI: 10.21293/1818-0442-2025-28-4-20-26

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Abstract: A modal filter (MF) with two tightly coupled signal conductors and two circuit ground conductors is simulated. A conductive intentional excitation by ultra-short pulse is applied between the latter under matched and mismatched conditions. Crosstalk is evaluated not only at the near and far ends, but also along the signal conductors. It is shown that under matched conditions, the crosstalk extrema along the conductors are 1.6–3.7 times higher than at the ends, and under mismatched conditions, they are 3.2–4.4 times higher. The crosstalk along the conductors can reach the amplitude of the impact, have a negative polarity, and exhibit an oscillating behavior. Not only the crosstalk waveforms are investigated, but also their N-norms, which assess the danger of excitation. Their maxima along the conductors were localized, found to be up to 4 times greater than at the ends.

Keywords: modal filter, ultrashort pulse, intentional electromagnetic interference, circuit ground, quasi-static analysis, crosstalk

Authors and copyright holders:

  • Yusaf M. D. , Tomsk State University of Control Systems and Radioelectronics (Tomsk, Russia)
  • Gazizov T. R. , Tomsk State University of Control Systems and Radioelectronics (Tomsk, Russia)

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Funding: The study was conducted at TUSUR with support from the Russian Science Foundation (grant no. 24-29-00579), https://rscf.ru/project/24-29-00579/.

For citation:
Yusaf M. D., Gazizov T. R. Ultrashort pulse excitation in circuit ground of a modal filter on a double-sided printed circuit board: Crosstalk along conductors. Doklady Tomskogo gosudarstvennogo universiteta sistem upravleniya i radioelektroniki, 2025, vol. 28, no. 4, pp. 20–26. DOI: 10.21293/1818-0442-2025-28-4-20-26

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