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To rapidly capture the electromagnetic scattering behavior of electrically large and complex structures, we have developed a hybrid high frequency (HF) simulation tool through the combination of different asymptotic methods, such as physical optics (PO), shooting and bouncing rays (SBR), and physical theory of diffraction (PTD). Careful consideration of integrating PO, PTD, and SBR together ensures...
In this paper, the implementation of UPML in DGTD is presented. Based on equations of UPML and the characteristics of the unstructured grid, time stepping strategy is given. The numerical results of radiation and scattering are demonstrated with good absorption of UPML in DGTD.
In this paper, the Finite-Difference Time-Domain (FDTD) method is used to simulate the near electromagnetic field when an aircraft is located on the layered half space. To solve this problem, the Π-shape Total-Field/Scattering-Field (TF-SF) boundary scheme is introduced. The 2D side TF/SF boundaries are governed by the modified 1D Maxwell's equations, and then, 3D TF/SF boundaries are projected onto...
This paper uses the generalized Rayleigh Jenkins ellipsoid approximation, establish the ablated particle scattering model based on Monte Carlo simulation method to research the effect of the ablated particles' coherent scattering. Compared with the vector radiative transfer theory and experimental data. According to several scattering conditions and the superposition of the scattering field, the scattering...
In some applications, such as emissivity calculation of finite object, scattering field and power must be calculated accurately. However, conventional method based on equivalent source integral on closed equivalent surface might not give accurate enough results, because the numerical error of scattering field in the strong scattering side of the object might have significant effect on the scattering...
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