Comments on “A New Conformal FDTD for Lossy Thin Panels” Ruiz-Cabello Núñez, Miguel David González García, Salvador Díaz Angulo, Luis Manuel Martín Valverde, Antonio Jesús Bourke, Samuel Flintoft, Ian Dawson, John Finite-difference methods Electromagnetic shielding Resonance Spurious solutions In the article titled “A new conformal FDTD for lossy thin1panels” by M. R. Cabelloet al., the appearance of spiky antiresonances2in the simulation of the shielding properties of lossy thin-shell spherical3cavities by FDTD was categorized as spurious solutions. In this article,4we briefly clarify this topic and show that these solutions are not5really spurious in the common interpretation of the term. Actually, they6correspond to physical solutions appearing due to lack of symmetry,7inherent to the staggered colocation nature of field components in FDTD. 2021-07-08T11:40:12Z 2021-07-08T11:40:12Z 2020 journal article Publisher version: M. R. Cabello et al., "Comments on “A New Conformal FDTD for Lossy Thin Panels”," in IEEE Transactions on Antennas and Propagation, vol. 68, no. 10, pp. 7234-7235, Oct. 2020, [doi: 10.1109/TAP.2020.2976582] http://hdl.handle.net/10481/69617 10.1109/TAP.2020.2976582 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ open access Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License IEEE