Spectrally-enahnced hybrid FVTD/PSTD schemes for electrically-large EMC structures

A hybrid conformal time-domain method with optimally-controlled spectral resolution is developed in this paper for the accurate analysis of large-scale EMC applications. The new 3D curvilinear forms combine a compact finite-volume time-domain with a Fourier-Chebyshev pseudospectral time-domain technique, which can efficiently decompose the total domain. A significant asset is that both algorithms are updated independently, while a set of spatial derivative approximators of controllable precision are launched to extract electromagnetic quantities in areas of fine details. For enhanced lattice quality at different material interfaces, dispersion-reduced operators, assigning the proper weights to each spatial step, are utilized. Hence, the discrete models attain highly rigorous and affordable simulations, free of mesh artifacts. Numerical results, involving elaborate comparisons of several electrically-large, real-world problems with reference data, validate the proposed methodology and unveil its universal applicability.