The Efficient Modeling Method of Thin-Sheet Window With Thin-Wire Nets in the Metallic Enclosures Illuminated by an Electromagnetic Pulse

This article presents a subcell method for modeling electrically thin dielectric material sheets with thin-wire nets in the finite-difference time-domain (FDTD) method. We improved the thin-sheet subcell method to model not only a thin magnetic and electric sheet including loss, but also a thin material with some thin-wire nets. The FDTD results were first compared with the transmission line theory method results in modeling electromagnetic propagating through an infinite material sheet. Then, the proposed subcell model is used to model a metallic enclosure with a thin dielectric window. With these formulas, the proposed FDTD algorithm is applied to analyze the shielding effectiveness of some conductive enclosures with an observation window consisting of thin-weir nets in the presence of a high-power electromagnetic pulse with arbitrary polarization.