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Time-domain high-order Nystrom method for analyzing transient electromagnetic scattering property of conductor

An electromagnetic scattering characteristic, transient technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as limiting the application of time domain methods, and achieve the effect of robustness

Inactive Publication Date: 2016-01-06
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0004] However, for the analysis of the transient electromagnetic scattering characteristics of conductors, because the traditional time-domain integral equation based on RWG basis functions requires discrete triangular elements to have a common inner edge, this greatly limits the application of this time-domain method in some practical problems. application

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  • Time-domain high-order Nystrom method for analyzing transient electromagnetic scattering property of conductor
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  • Time-domain high-order Nystrom method for analyzing transient electromagnetic scattering property of conductor

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Embodiment Construction

[0014] Aiming at the conductor structure, the present invention adopts the method of time domain integral equation to analyze its transient electromagnetic scattering characteristics. Compared with the traditional time-domain integral equation method based on RWG basis functions, the high-order Nystrom method in the time domain has the advantage of being robust to discrete grids. Because the traditional time-domain integral equation based on the RWG basis function requires that the discrete triangular elements have a common inner edge, which greatly limits the application of this method in some practical problems. However, the vector interpolation basis functions used by the high-order Nystrom method in the time domain are defined at the interpolation points in the triangular units of the discrete surface, and there is no requirement for a common inner edge.

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings. ...

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Abstract

The invention discloses a time-domain high-order Nystrom method for analyzing a transient electromagnetic scattering property of a conductor. The method comprises: establishing a conductor surface time-domain integral equation; performing time discretization on the conductor surface time-domain integral equation by adopting a triangular basis function, and performing spatial discretization by adopting a two-order curved surface triangular unit; forming a to-be-solved matrix equation by adopting a Galerkin test in time and point matching in space, wherein an unknown current is a transient surface current of the conductor; and solving the matrix equation to obtain a transient surface current coefficient of the conductor, and calculating a transient electromagnetic scattering parameter by the current coefficient according to a reciprocal theory. Compared to a conventional RWG basis function based time domain integral equation method, the time-domain high-order Nystrom method has the advantage of robustness of a discrete grid.

Description

technical field [0001] The invention belongs to a time-domain integral equation method for analyzing the transient electromagnetic scattering characteristics of a conductor target, in particular to a time-domain high-order Nystrom method for analyzing the transient electromagnetic scattering characteristics of a conductor. Background technique [0002] The acquisition and analysis of electromagnetic scattering characteristics of radar targets is a very important research field in electromagnetic problems. Electromagnetic scattering waves of targets are the information sources for many applications in radar detection, remote sensing observation and geological surveying. Quantitative analysis of scattering characteristics is the key to these application systems. The main basis when designing and working. The physical quantities such as the shape and volume of the radar target are obtained by calculating the parameters such as the radar cross section. Therefore, the research o...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 陈如山丁大志樊振宏曹军
Owner NANJING UNIV OF SCI & TECH
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