The FDTD technique is frequently employed for radar cross section (RCS) prediction of aircraft, despite its well-known dispersion errors. Typically, an aircraft exhibits an electrical size ranging from approximately 500λ to 1800λ, where λ denotes the radar wavelength. Unfortunately, along the axial direction, the effective FDTD wavelength can reach 7λ to 25λ; values that are unacceptable for the design and analysis of modern air vehicles. In contrast, the Non-Standard Finite-Difference Time-Domain (NSFDTD) Method NS-FDTD scheme yields zero dispersion error under the same conditions.
In this presentation, we propose a 3D subgrid model for NS-FDTD method; enhancing the subgrid model by implementing a novel boundary connection algorithm and applying multiple Gaussian smoothing filters. These improvements enabled stable simulations exceeding two million iterations, compared with 0.2 million iterations previous year, with artificial loss reduced to one-tenth of previous levels.
Speaker(s): , YASUSHI KANAI
Room: EC 3960, 10555 W Flagler St, , miami, Florida, United States, 33174, Virtual: https://events.vtools.ieee.org/m/510504
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