Hybrid thin-slot algorithm for the analysis of narrow apertures in finite-difference time-domain calculations

Abstract

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A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

“…Thin-slot formalism permits inclusion of conducting plates with arbitrarily narrow apertures or gaps without requiring any corresponding need to reduce the cell size to the gap width or depth for the FDTD analysis. Several Thin-slot formalisms have been proposed in the literature [18][19][20][21][22][23]. However, they are mostly for apertures having zero thickness, and when slots with finite thickness are involved, only the hybrid thin-slot algorithm (HTSA) can be effective [22].…”

“…Several Thin-slot formalisms have been proposed in the literature [18][19][20][21][22][23]. However, they are mostly for apertures having zero thickness, and when slots with finite thickness are involved, only the hybrid thin-slot algorithm (HTSA) can be effective [22]. Nevertheless, the HTSA is complicated to implement, sensitive and susceptible to instability [24].…”

Transient Responses of Coaxial Cables in an Electrically Large Cabin With Slots and Windows Illuminated by an Electromagnetic Pulse

“…Under such circumstances, significant increase in memory and running time is required, because very fine time step must be chosen so as to satisfy the CourantFriedrichs-Lewy (CFL) stability condition. We know that there are three different sub-cellular thin slot algorithms proposed to model thin slots in some metallic enclosures based on the thin slot formalism (TSF), which are denoted by C-TSF, enhanced-TSF, and improved-TSF [11,12], respectively. With the enhanced-TSF technique, both electric and magnetic field components in the slot, one transverse to the slot, and the other across the slot, can be obtained.…”

Generation of FDTD subcell equations by means of reduced order modeling

“…The update equations were derived using a Faraday's law contour integral approach. In [8], an integral-equation based thin-slot algorithm allowed to model slots with a very small depth by using an equivalent antenna. Subcell models were also developed for thin sheets: in [9] several methods for modeling thin dielectric sheets are compared.…”