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Multi-resolution precondition method for analyzing aerial radiation and electromagnetic scattering

A technology of antenna radiation and electromagnetic scattering, applied in electrical digital data processing, instruments, calculations, etc., can solve problems such as the limitation of modeling ability of complex shapes and structures, and achieve the goal of accelerating electromagnetic simulation speed, improving behavior, and improving modeling ability. Effect

Active Publication Date: 2011-08-17
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, the defect of the multi-resolution preconditioning method based on grid subdivision is that it needs to construct a series of stacked grids through grid subdivision, and the shape of the stacked grid consists of the coarse layer with the largest grid size Grid decision, the ability to model complex shape structures is limited

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  • Multi-resolution precondition method for analyzing aerial radiation and electromagnetic scattering
  • Multi-resolution precondition method for analyzing aerial radiation and electromagnetic scattering
  • Multi-resolution precondition method for analyzing aerial radiation and electromagnetic scattering

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Embodiment Construction

[0024] Combine below figure 1 The shown cavity is an open curved rectangular cavity with a length of 8.7cm, a width of 10cm, and a bending angle of 30° as a simulation target example. The application of the multi-resolution preconditioning method in the analysis of electromagnetic scattering in the present invention is further described in detail. For the antenna radiation problem, the treatment is similar. The specific implementation steps are as follows:

[0025] In the first step, according to the size of the open curved rectangular cavity, the computer-aided tool Ansys software is used to model, and the triangle patch is used to discretely divide the open curved rectangular cavity of the simulation target to generate a discrete mesh that can describe the shape of the open curved rectangular cavity files such as figure 1 As shown, the number of triangles produced by the discretization is 4317. As can be seen from the figure, the open curved rectangular cavity can be well...

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Abstract

The invention discloses a multi-resolution precondition method for analyzing aerial radiation and electromagnetic scattering problems in electromagnetic simulation. The method is a method for generating a multi-resolution basis function by using a geometrical mode on a laminar grid constructed in a grid aggregation mode and further generating multi-resolution preconditions, wherein the multi-resolution basis function is formed by linear combination of a classical vector triangle basis function (RWG), and can be conveniently applied to the conventional moment method electromagnetic simulation program to effectively improve the behavior of a matrix formed in the moment method electromagnetic simulation process so as to realize acceleration of the iterative solution process of a matrix equation and fulfill the purpose of accelerating the moment method electromagnetic simulation process. Meanwhile, the multi-resolution pre-processing technology can also be conveniently combined with a quick algorithm such as a quick multi-pole algorithm. The method has the advantages of short calculation time and capability of ensuring high precision of the program and low demand of a computing memory, and can effectively improve the computing efficiency of the conventional electromagnetic simulation.

Description

technical field [0001] The invention belongs to electromagnetic simulation technology, in particular to a multi-resolution preconditioning method for quickly analyzing antenna radiation and electromagnetic scattering problems by using the method of moments. Background technique [0002] Antenna radiation and electromagnetic scattering characteristics are of great significance in the design of radar systems and target recognition, stealth and anti-stealth of military weapons, and electromagnetic compatibility in complex environments. The research methods of antenna radiation and electromagnetic scattering characteristics can be divided into numerical simulation methods and experimental methods. Experimental methods are expensive, long-term, and require a lot of manpower and material resources. With the continuous improvement of computer technology, numerical simulation methods have become an important research in the field of practical engineering applications such as designi...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 陈如山丁建军樊振宏丁大志盛亦军沙侃叶晓东陈明
Owner NANJING UNIV OF SCI & TECH
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