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Processing method of external electromagnetic source item of three-dimensional time domain hybrid discontinuous Galerkin method

An electromagnetic source and applied current technology, applied in design optimization/simulation, etc., can solve problems such as large leakage in the scattering field area and sparse grid sampling density

Active Publication Date: 2020-04-28
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

For the time-domain discontinuous Galerkin method, the grid sampling density will be much sparser than that of the time-domain finite-difference method due to the smaller numerical dispersion error, resulting in larger leakage in the scattered field region when applying the total field-scattered field technique
It can be seen that there are different degrees of shortcomings in these commonly used ways of adding sources, especially the numerical methods themselves have their own advantages and disadvantages. For the optimization simulation of complex models, they can no longer meet the requirements of designers. Therefore, a stable and reliable numerical method is needed. Deal with the external electromagnetic source term, and then obtain the electromagnetic response characteristics of the electromagnetic problem

Method used

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  • Processing method of external electromagnetic source item of three-dimensional time domain hybrid discontinuous Galerkin method
  • Processing method of external electromagnetic source item of three-dimensional time domain hybrid discontinuous Galerkin method
  • Processing method of external electromagnetic source item of three-dimensional time domain hybrid discontinuous Galerkin method

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Embodiment

[0121] The following metal composite sphere is used as a model, and a point source is added to analyze the local source radiation problem of the active 3D hybrid time-domain discontinuous Galerkin numerical method.

[0122] figure 2 The model is a composite structure composed of a perfect conductor metal ball and a perfect conductor metal cylinder. The radius of the metal ball is 1m, the radius and height of the cylinder are 0.02m and 0.1m, respectively, and are placed at a distance of 0.1m from the surface of the metal ball. At the center of the gap between the metal ball and the cylinder r s =(-1.05,0,0), a local radiation source with a frequency of f=300MHz in the positive z direction is set In order to obtain higher calculation accuracy around the local radiation source, the source point r s Local mesh refinement around, such as figure 2 As shown, the encrypted grid is marked with a shaded cube (a flat-shaped square area). The calculation area is a cube, which is cut off b...

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Abstract

The invention relates to a processing method of an external electromagnetic source item of a three-dimensional time domain hybrid discontinuous Galerkin method, belongs to the technical field of three-dimensional time domain electromagnetism numerical solution, and relates to a three-dimensional time domain electromagnetism time domain hybrid discontinuous Galerkin numerical method aiming at the problem of the external electromagnetic source item. The method is based on an active Maxwell equation, and a construction form of time-domain hybrid discontinuous Galerkin is derived. In the source item, corresponding processing technologies are respectively provided for the impressed current density and the impressed magnetic current density, so that the method can be suitable for different boundary conditions for different problems. Compared with an existing passive time domain hybridization discontinuous Galerkin method, the improved active time domain hybridization discontinuous Galerkin method is higher in applicability. Compared with a traditional time domain discontinuous Galerkin method, the method has less global unknown quantity and remarkable calculation performance.

Description

Technical field [0001] The invention belongs to the technical field of numerical solution of three-dimensional time-domain electromagnetics. Aiming at the problem of adding electromagnetic source terms, a time-domain hybrid intermittent Galerkin numerical method containing source terms is used to calculate electromagnetic fields. Background technique [0002] The Maxwell equations are the basic equations describing the general laws of macroscopic electromagnetic phenomena. The analysis of various electromagnetic problems, in the final analysis, is to solve the Maxwell equations under different boundary conditions and medium distribution. With the development of computers and computational mathematics, numerical methods of computational electromagnetics have been rapidly developed, and the corresponding electromagnetic simulations have been widely used in many fields such as microwaves, antennas, and new materials for anisotropic media. [0003] The current numerical methods of elec...

Claims

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Application Information

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IPC IPC(8): G06F30/20
CPCY02E60/00
Inventor 徐立李星杨中海李斌
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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