FDTD Simulation of Shielding Effectiveness of Metal-Coated Plastics for Pulsed Electromagnetic Fields

Abstract

The use of metal-coated plastics is increasing as shielding materials of electronic and information products due to their lightweight. In this paper, a finite-difference time-domain (FDTD) algorithm, based on the derivation of a time-domain representation of the surface impedance of an equivalent resistive film, was developed to analyze the electromagnetic penetration of pulsed electromagnetic fields through metal-coated plastics. The validity of the proposed algorithm, in both the far-field and near-field cases, was verified by comparing the calculated penetrated electromagnetic fields or shielding effectiveness with theoretical and measured ones. Good agreement between them demonstrated the usefulness of the FDTD algorithm.

A Robust Method to Accurately Treat Arbitrarily Curved 3-D Thin Conductive Sheets in FDTD

“…Assuming harmonic behavior in steady state for the thin sheet edge with amplitude , one can insert the analytical solution given by (3) to (6) into (8) to find (9) For it follows that must be equal to (10) which can be simplified to (11) using . This corresponds to the standard definition for the curl update coefficient in the Yee scheme.…”

“…Multiple approaches to treat TC sheets [2]- [9], an overview can be found in [10] and thin layers in general [11]- [16] with the FDTD method have been reported. However, most suffer from the fact that they show results for flat, grid-aligned sheets only.…”

Virtual metal model for fast computation of shielding effectiveness of blended electromagnetic interference shielding fabric

“…Main computation methods are analytic calculation [35], transmission line method [36], finite difference time domain [37], moment method [38], and transmission line matrix [39]. However, the initial condition and boundary condition setting of above methods are not suitable for the SE computation of the EMI shielding fabric.…”