Plasma electromagnetic scattering modeling method based on time domain shooting and bouncing rays method

A bouncing ray method and plasma technology, applied in the field of plasma electromagnetic scattering modeling, can solve the problems of not considering the influence of non-uniform characteristics, unable to solve the large size of electricity, and unable to realize fast modeling of broadband scattering

Inactive Publication Date: 2019-04-05
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

The first method uses numerical methods such as finite difference in time domain or integral equation, which consumes a lot of computing time and computing resources (memory), and cannot solve the problem of large size.
For the second method, although the calculation speed is improved, it does not consider the refraction of electromagnetic waves in the plasma and the influence of the non-uniform characteristics of the plasma sheath, and this method can only be calculated at point frequencies, and cannot achieve broadband scattering characteristics. rapid modeling
Therefore, the applicability of prior art solutions is greatly limited

Method used

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  • Plasma electromagnetic scattering modeling method based on time domain shooting and bouncing rays method
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  • Plasma electromagnetic scattering modeling method based on time domain shooting and bouncing rays method

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Embodiment Construction

[0076] based on the following Figure 1 to Figure 5 , specifically explain the preferred embodiment of the present invention.

[0077] Such as figure 1 As shown, the present invention provides a plasma electromagnetic scattering modeling method based on the time-domain bouncing ray method, comprising the following steps:

[0078] Step S1, performing ray tracing and field intensity tracing in the time-varying plasma;

[0079] Determine the virtual aperture surface according to the pitch angle, azimuth angle and target shape information, project rays from the virtual aperture to the target area, use the rays to simulate the propagation process of electromagnetic waves in the time-varying plasma, recursively trace the rays, and obtain the rays on the target The multiple reflection intersection information of the area (such as figure 2 shown), and trace the field intensity along the ray path to obtain the electric field information of each intersection point of the ray in the ...

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Abstract

The invention discloses a plasma electromagnetic scattering modeling method based on the time domain shooting and bouncing rays method. The method utilizes rays to simulate the reflection and the refraction of electromagnetic waves in a multilayer plasma, and realizes electromagnetic scattering modeling of a plasma coated target by field strength tracking and far field solution of the rays. The method is an effective electromagnetic scattering modeling scheme for superhigh speed target in lean atmosphere, which enables the rapid modeling of the broadband scattering characteristics of the plasma coated target and greatly expands the scope of application.

Description

technical field [0001] The invention relates to the field of electromagnetic scattering modeling, in particular to a plasma electromagnetic scattering modeling method based on a time-domain bouncing ray method. Background technique [0002] The Radar Cross Section (RCS) of a target is an important characteristic parameter of radar detection technology, stealth and anti-stealth technology, and is the most basic parameter to characterize the scattering characteristics of a target. RCS analysis and prediction is based on various electromagnetic scattering theories to study various mechanisms of scattering fields in scenes, and uses various approximate calculation methods and computer technology to quantitatively estimate the electromagnetic scattering characteristics of targets. At present, the RCS research on the static target body has been perfected day by day, but the electromagnetic scattering modeling method for the plasma-enveloped target needs to be developed. The high-...

Claims

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Application Information

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IPC IPC(8): G01S13/00
CPCG01S13/006
Inventor 谢志杰王彪高伟
Owner SHANGHAI RADIO EQUIP RES INST
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