2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/111794We present an investigation of the modulational instability of partially coherent signals in electrical transmission lines. Starting from the modified Ginzburg-Landau equations and the Wigner-Moyal representation, we derive a nonlinear dispersion relation for the modulational instability. It is found that the effect of signal broadbandness reduces the growth rate of the modulational instability.5 pages, 1 figure, to appear in Physical Review EOpticstext