Near-Field Time-Domain Shielding Effectiveness of Thin Conductive Screens

Abstract

Abstract-The time-domain shielding effectiveness of planar conductive thin screens excited by a transient electric-line source is studied in detail by means of an approximate semi-analytical formulation based on a Cagniard-De Hoop approach. Such a formulation allows for easily deriving and discussing several definitions of time-domain shielding effectiveness, recently introduced in the literature. Comparisons with results obtained numerically through an exact canonical double inverse Fourier transform are provided which furnish a benchmark to discuss the advantages and limits of the proposed approximate formulation.

Semi-Analytical Representation of the Two-Dimensional Time-Domain Green's Function of a Graphene Sheet in the Intraband Regime

“…which exactly coincides with the result previously obtained for a non-dispersive metallic film [14].…”

“…which is like a Laplace transform integral except the contour C is not the positive real axis, but it is the image of the vertical path (−j∞ + a, +j∞ + a) in the complex p plane on the complex τ plane via (14). By using a modified Cagniard-De Hoop method [25], the 2-D TD potential GF can be obtained in a simple form as a one-dimensional integral.…”

“…and conductive properties [13] and we applied it to derive an approximate closed-form expression for the 2-D TD GF of a thin conductive screen characterized by a constant conductivity [14], [15].…”

Electromagnetic pulse response of planar screens

“…In some special cases, when the screen can be modeled as a thin sheet and in the presence of a pulsed line source or a pulsed vertical dipole, the solution can be obtained in a purely analytical or semianalytical form through a modified Cagniard–de Hoop approach . However, in the general case and in the presence of a possibly thick multilayered structure, a numerical approach has to be pursued.…”

Presentation of an Algorithm for Secure Data Transmission based on Optimal Route Selection during Electromagnetic Interference Occurrence

“…Therefore flux distribution in a cavity is obtainable as input parameter of safe route selection. Also, the shielding efficiency of an enclosure is specified by the Shielding Effectiveness (SE), defined as the ratio of the electric/magnetic field at an observation point without and with the enclosure [17], [21][22][23][24][25][26][27]. To achieve move security use of turbo codes in Physical-layer Network Coding (PNC) system to ensure reliable communication is suggested.…”