A Subcell Finite-Difference Time-Domain Implementation for Narrow Slots on Conductive Panels Ruiz-Cabello Núñez, Miguel David Martín Valverde, Antonio Jesús Rubio Bretones, Amelia Consuelo Gascón Bravo, Alberto González García, Salvador Numerical electromagnetics Complex electromagnetic environments Electromagnetic compatibility Finite Difference Time Domain (FDTD) Narrow slot Small apertures Subcell modeling Subgridding Thin gaps Funded by the European Union under GA no 101101961-HECATE. Views and opinions expressed are, however, those of the author(s) only and do not necessarily reflect those of the European Union or Clean Aviation Joint Undertaking. Neither the European Union nor the granting authority can be held responsible for them. The project is supported by the Clean Aviation Joint Undertaking and its Members and, by Spanish Ministry of Science and Innovation (MICINN) under projects eSAFE-UAV PID2019-106120RB-C32; PID2019-106120RB-C33. Efficiently modeling thin features using the finite-difference time-domain (FDTD) method involves a considerable reduction in the spatial mesh size. However, in real-world scenarios, such reductions can lead to unaffordable memory and CPU requirements. In this manuscript, we present two stable and efficient techniques in FDTD to handle narrow apertures on conductive thin panels. One technique employs conformal methods, while the other utilizes subgridding methods. We validate their performance compared to the classical Gilbert-Holland model and present experimental results in reverberation environments to shed light on these models' actual confidence margins in real electromagnetic compatibility (EMC) scenarios. 2023-09-20T12:32:10Z 2023-09-20T12:32:10Z 2023-08-03 info:eu-repo/semantics/article Ruiz Cabello, M.; Martín Valverde, A.J.; Plaza, B.; Frövel, M.; Poyatos, D.; R. Bretones, A.; G. Bravo, A.; G. Garcia, S. A Subcell Finite-Difference Time-Domain Implementation for Narrow Slots on Conductive Panels. Appl. Sci. 2023, 13, 8949. [https://doi.org/10.3390/app13158949] https://hdl.handle.net/10481/84531 10.3390/app13158949 eng http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Atribución 4.0 Internacional MDPI