Title :
A new model for the FDTD analysis of the shielding performances of thin composite structures
Author :
Sarto, Maria Sabrina
Author_Institution :
Dept. of Electr. Eng., Rome Univ., Italy
fDate :
11/1/1999 12:00:00 AM
Abstract :
A new model is proposed for the transient analysis of the electromagnetic field penetration through air-embedded conductive structures realized by thin multilayered composite panels. A magnetic field controlled formulation is developed in the frequency-domain to express the tangential components of the electric field on the external faces of the composite slab as a function of the tangential components of the magnetic field by means of the surface and transfer impedances of the thin panel coated on a perfect magnetic medium. The corresponding time-domain model is obtained by applying the inverse Fourier transform to the field quantities; an efficient piecewise linear convolution procedure is developed for the numerical calculation of the resulting convolution integrals. The model is implemented in one-dimensional (1-D) and two-dimensional (2-D) FDTD codes and applied to the analysis of different shielding configurations, both in the frequency and in the time domain
Keywords :
Fourier transforms; composite materials; conducting bodies; convolution; electric fields; electric impedance; electromagnetic fields; electromagnetic shielding; finite difference time-domain analysis; frequency-domain analysis; inhomogeneous media; integral equations; inverse problems; magnetic fields; piecewise linear techniques; transient analysis; 1D FDTD code; 2D FDTD code; FDTD analysis; air-embedded conductive structures; composite materials; composite slab; convolution integrals; efficient piecewise linear convolution; electric field; electromagnetic field penetration; frequency-domain; inverse Fourier transform; magnetic field controlled formulation; perfect magnetic medium; shielding configurations; shielding performance; surface impedance; tangential components; thin composite structures; thin multilayered composite panels; time-domain model; transfer impedance; transient analysis; Convolution; Electromagnetic fields; Electromagnetic modeling; Finite difference methods; Frequency domain analysis; Magnetic analysis; Magnetic shielding; Performance analysis; Time domain analysis; Transient analysis;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
