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An unconditionally stable solution using associated Hermite (AH) functions is proposed for the finite-difference time-domain (FDTD) method. The electromagnetic fields and their time derivatives in time-domain Maxwell's equations are expanded by these orthonormal basis functions. By applying Galerkin temporal testing procedure to these expanded equations the time variable can be eliminated from the...
In this paper, the impact of metallic door on the field cross-section distribution of the ultra wide band electromagnetic pulse in protected engineering underground is analyzed by using finite-difference time-domain method, which is significant for the electromagnetic protection of the engineering underground and the wireless communications in tunnel. The tunnel can be seen as a waveguide approximately,...
This paper presents the characteristic of the field cross-section distribution of the EMP propagation in crooked tunnel, which is significant for the electromagnetic protection of the engineering underground and the wireless communications in tunnel. The tunnel can be seen as a waveguide approximately, and is excited by propagation model such as TE10, TM11, etc. We use parallel FDTD algorithm to deal...
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