Subgridding Boundary Conditions to Model Arbitrarily Dispersive Thin Planar Materials Ruiz-Cabello Núñez, Miguel David Díaz Angulo, Luis Manuel Álvarez, Jesús Rubio Bretones, Amelia Consuelo González García, Salvador Finite differences Subcell models Thin-layer modeling Time domain In a previous work, we presented a hybrid implicit–explicit Crank–Nicolson finite-difference time-domain method for treatingmultilayered lossy thin slabs. The main advantage of this methodwas its capability to overcome certain late-time stability issues of theconventional surface impedance boundary condition approaches. In thiscommunication, we extend this method to deal with thin slabs havingarbitrarily dispersive profiles. This approach is validated with the analysisof a spherical shell made of a metallic wire mesh whose macroscopicequivalent constitutive parameters are derived from its microscopicstructure. The results for the electric field inside the sphere are comparedagainst the analytical data and show good agreement with them. 2021-07-08T11:50:46Z 2021-07-08T11:50:46Z 2018 info:eu-repo/semantics/article Publisher version: M. Ruiz Cabello, L. D. Angulo, J. Alvarez, A. R. Bretones and S. G. Garcia, "Subgridding Boundary Conditions to Model Arbitrarily Dispersive Thin Planar Materials," in IEEE Transactions on Antennas and Propagation, vol. 66, no. 11, pp. 6429-6434, Nov. 2018, [doi: 10.1109/TAP.2018.2862241] http://hdl.handle.net/10481/69619 10.1109/TAP.2018.2862241 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License IEEE