A Method for Computing Electromagnetic Field in Frequency Domain Based on Implicit fvfd

Abstract

The present invention provides a method for calculating frequency-domain electromagnetic fields based on implicit FVFD, which includes performing simulation modeling in combination with boundary condition information based on the physical background of the electromagnetic problem simulated by the target; quadrilateral or hexahedral grids in the numerical calculation area, on the walls and The geometric singularity is encrypted, and the grid is gradually sparse away from the scattering wall; output grid data files and set and output boundary condition files; input target calculation electromagnetic parameters, numerical calculation control parameters; input grid data and boundary condition information file, initialize the calculation of the space electromagnetic field; iteratively solve the frequency-domain electromagnetic field of Maxwell's equations; output the spatial distribution of the real and imaginary parts of the electromagnetic field, and output the spatial distribution data of the surface induced current and the radar cross section. The invention can solve the large-scale electromagnetic scattering problem of arbitrary complex shapes and high-frequency electric large-size targets.

Description

technical field [0001] The present invention relates to the technical field of frequency-domain numerical solution of electromagnetics, in particular to a method for calculating frequency-domain electromagnetic fields based on implicit FVFD (Finite Volume Frequency Domain, FVFD). Background technique [0002] The electromagnetic scattering of targets with complex shapes and electromagnetic interference in complex electromagnetic environments require the calculation of the spatial distribution of electromagnetic fields. Electromagnetic fields satisfy Maxwell's equations. With the development of computer technology, it is possible to directly solve the equations. The same hyperbolic mathematical characteristics as the Euler equation promote the application of computational fluid dynamics (Computational Fluid Dynamics, CFD) technology in electromagnetic field calculations, among which the finite difference time domain (FDTD) and finite volume method in time domain (Finite Volum...

AI Technical Summary

Problems solved by technology

On the one hand, the field calculation micro-classification method has unique advantages and engineering requirements in simulating complex detailed structures and heterogeneous materials. On the other hand, the current frequency-domain micro-classification algorithm is not yet perfect.

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