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Time domain electric field integral equations often are used to analyze transient scattering from perfect electrically conducting objects. When discretized using marching-on-in-time recipes they give rise to linear systems of equations that can be solved for the induced currents for all time steps. Unfortunately, when the scatterer is approximated by increasingly dense meshes, the condition number...
An efficient, accurate, and stable time-domain finite element-boundary integral (TD-FE- BI) solver for analyzing scattering and radiation from electrically large platforms supporting geometrically intricate antenna structures is presented. The proposed scheme separates the antenna and the platform by introducing a single boundary/interface surface. It then formulates vector-wave FE and combined field...
A novel algorithm that accelerates marching on in time-based time domain integral equation solvers by rapidly evaluating transient fields due to spatially finite and temporally bandlimited (historical and surface-bound) source constellations is described. The multi-level Cartesian non-uniform grid time domain (ML-CNGTD) algorithm accomplishes the rapid evaluation by restoring delay- and amplitude-compensated...
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