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Electromagnetic scattering simulation method of one-dimensional conductor rough sea surface and two-dimensional conductor target

A rough sea surface, electromagnetic scattering technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of current coupling without considering the TDPO region, reducing the complexity of the solution, and complex program implementation.

Inactive Publication Date: 2015-04-29
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there are mainly two fast algorithms based on TDIE. The first method is the time-domain plane wave algorithm proposed by A.A.Ergin, B.Shanker Walker, etc. This method is actually the time-domain version of the fast multipole technology. The computational complexity is greatly reduced, but the program implementation is extremely complex; the second method is a hybrid method of time domain physical optics (TDPO: Time Domain Physical Optics) and TDIE, which models the electrically large and smooth part of the target as TDPO area, modeling the electrically small and fine part as a TDIE area, does not consider the coupling between currents in the TDPO area, thus greatly reducing the complexity of the solution

Method used

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  • Electromagnetic scattering simulation method of one-dimensional conductor rough sea surface and two-dimensional conductor target
  • Electromagnetic scattering simulation method of one-dimensional conductor rough sea surface and two-dimensional conductor target
  • Electromagnetic scattering simulation method of one-dimensional conductor rough sea surface and two-dimensional conductor target

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Effect test

specific Embodiment 1

[0097] The electromagnetic scattering simulation method of a one-dimensional conductive rough sea surface and a two-dimensional conductive mesh includes the following steps:

[0098] (1) Input the power spectral density function of the one-dimensional conductive rough sea surface and rough sea surface parameters, and obtain the position coordinates of N discrete surface elements on the rough sea surface by Monte Carlo method f -1 (x -1 ,z -1 ), f 0 =(x 0 ,z 0 ), f 1 =(x 1 ,z 1 ),···, That is, the one-dimensional conductive rough sea surface is modeled to generate the one-dimensional conductive rough sea surface;

[0099] (2) Under the illumination of the incident wave, the one-dimensional conductor rough sea surface and the two-dimensional infinitely long conductor target are divided;

[0100] (3) Use conical waves to incident on the one-dimensional conductor rough sea surface and the two-dimensional infinitely long conductor target;

[0101] (4) According to the ...

specific Embodiment 2

[0160] The composite electromagnetic scattering simulation method based on the TDIE / TDKA hybrid method of conductor rough sea surface and target is the same as that in Embodiment 1, wherein the cylindrical target in step 1 is replaced by a corner reflector target.

[0161] Simulation conditions:

[0162] The parameters of the conductor rough sea surface are selected as follows: the sampling wavelength is λ=0.5m, the root mean square height δ=0.2-λ, the correlation length is l=1.5-λ, and the spectral density function of the rough sea surface is selected as the PM spectral function, The radar incident wave parameters used in the simulation are T=4LM,ct 0 = 6LM, f 0 =375MHZ. The discretization interval of surface elements on the rough surface of the conductor is The number of discrete sampling points on the rough surface of the medium is N=512, the length of the rough sea surface is 25.6m, and a total of 512 unknown quantities are divided. The targets are two-dimensional...

Embodiment 3

[0169] The composite electromagnetic scattering simulation method based on the TDIE / TDKA hybrid method of conductor rough sea surface and target is the same as in Embodiment 1-2, wherein the cylindrical target in step 1 is replaced with a square column target. .

[0170] Simulation conditions:

[0171] The parameters of the conductor rough sea surface are selected as follows: the sampling wavelength is λ=0.5m, the root mean square height δ=0.2-λ, the correlation length is l=1.5-λ, and the spectral density function of the rough sea surface is selected as the PM spectral function, The radar incident wave parameters used in the simulation are T=4LM,ct 0 = 6LM, f 0 =375MHZ. The discretization interval of surface elements on the rough surface of the conductor is The number of discrete sampling points on the rough surface of the medium is N=512, the length of the rough sea surface is 25.6m, and a total of 512 unknown quantities are divided. The target is a metal square col...

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Abstract

The invention relates to an electromagnetic scattering simulation method of a one-dimensional conductor rough sea surface and a two-dimensional conductor target. The method comprises the following steps: (1) inputting a power spectral density function of the one-dimensional conductor rough sea surface and a rough sea surface parameter, modeling the one-dimensional conductor rough sea surface to generate a one-dimensional conductor rough sea surface; (2) subdividing the one-dimensional conductor rough sea surface and a two-dimensional infinite long conductor target under the irradiation of an incident wave; (3) incoming a conical wave to the one-dimensional conductor rough sea surface and the two-dimensional infinite long conductor target; (4) according to the boundary conditions in the electromagnetic field, acquiring a time stepping equation of a display format of the incident wave one-dimensional conductor rough sea surface and the two-dimensional infinite long conductor target under the incidence; and (5) solving out a two-dimensional transient far field according to the numerical value of the current response of the target changing along the time. The method disclosed by the invention has the following beneficial effects that the interaction of the rough sea surface and the electromagnetic wave of the target is visually represented; and the composite electromagnetic scattering of the rough sea surface and the target under different wind speeds is simulated.

Description

technical field [0001] The invention belongs to the technical field of radar electromagnetic simulation, and in particular relates to an electromagnetic scattering simulation method for a one-dimensional conductor rough sea surface and a two-dimensional conductor object. Background technique [0002] The problem of electromagnetic scattering on the sea surface is widely used in various military fields, and due to the rapid development of radar technology, people pay more and more attention to the research of this problem. The detection process of the radar target is actually a process of electromagnetic scattering, that is, the electromagnetic wave emitted by the radar is reflected back by the detection target to generate an echo, and the characteristics of the detected target can be obtained by analyzing the specific information of the echo. For example, some relevant information of the sea surface can be obtained from the detected scattered echoes of the sea surface, such ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 郭立新朱正英何红杰
Owner XIDIAN UNIV
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