Non-invasive Optimal Coupling Upon Detection of a Local Change of Impedance in a Cable Network

K. Brahima Yeo (1) , Matthieu Davy (1) , Philippe Besnier (1)

1 IETR - Institut d'Électronique et des Technologies du numéRique

In this paper, we apply a novel wavefront shaping technique within a cable network. By manipulating an array of crosstalk sources at different locations of the network, we demonstrate experimentally a strong enhancement of the intensity at a specific wire end where an impedance change occurs. The optimal wavefront for maximal focusing is determined noninvasively using the generalized Wigner-Smith operator. Our approach relies on two successive measurements of the scattering matrix measured at the injection ports, before and after the change. The optimal wavefront then closely corresponds to the first eigenstate of the generalized Wigner-Smith operator. Thus, a maximum intensity may be reached at a remote distance without cooperation of the target, opening up new perspectives in the context of electromagnetic aggressions or attacks (cybersecurity).

Domaines: Electromagnétisme

K. Brahima Yeo, Matthieu Davy, Philippe Besnier. Non-invasive Optimal Coupling Upon Detection of a Local Change of Impedance in a Cable Network. 2021 IEEE International Joint EMC/SI/PI and EMC Europe Symposium, Jul 2021, Glasgow, United Kingdom. ⟨hal-03576186⟩