Near-field electromagnetic scattering modeling method for plasma-coated target
A plasma and near-field electromagnetic technology, applied in geometric CAD, design optimization/simulation, special data processing applications, etc., can solve problems such as limited applicability
Active Publication Date: 2021-02-19
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology
This method aims to solve the problem of limited applicability of non-parallel layered plasma coating targets in near-field electromagnetic scattering, by making the plasma equivalent to a layered medium and introducing the effects of near-field divergence and transmission attenuation into the plasma In the bouncing ray method covering the target, the near-field electromagnetic scattering modeling of the plasma covering target is realized, which greatly expands the scope of application
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[0051] The present invention will be further described below with reference to the accompanying drawings through specific embodiments. These embodiments are only used to illustrate the present invention, and are not intended to limit the protection scope of the present invention.
[0052] The present invention provides a near-field electromagnetic scattering modeling method for a plasma-coated target, such as figure 1 shown, including the following steps:
[0053] Step 1: The near-field emission antenna emits the incident ray i(incidentRay) to the plasma-coated target, performs multiple ray projections on the surface of the plasma-coated target, and projects multiple reflected rays r(reflectedRay) and multiple refracted rays γ(Refraction Ray);
[0054] Wherein, the ray casting includes the following steps:
[0055] Step 1.1: the near-field emission antenna emits incident ray i to the surface of the plasma-coated target; wherein, the emitting incident ray i further includes t...
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The invention discloses a near-field electromagnetic scattering modeling method for a plasma-coated target, and the method comprises the following steps: 1, transmitting an incident ray for ray projection, and obtaining a plurality of reflected rays and refracted rays; 2, performing near-field ray tracing calculation according to the incident rays, the multiple reflection rays and the refraction rays to obtain side vectors of the multiple reflection rays and side vectors of the refraction rays; 3, performing near-field intensity tracking calculation according to the incident ray, the multiplereflected rays and the refracted rays to obtain incident field intensity, reflected field intensity and refracted field intensity; and 4, performing near-field integral calculation to obtain a scattered electric field contribution value. According to the invention, the problem that the applicability of the near-field electromagnetic scattering plasma coated target is limited is solved, the plasmais equivalent to a layered medium, and the near-field divergence, transmission attenuation and other effects are introduced into a bounce ray method of the plasma coated target, so that near-field electromagnetic scattering modeling of the plasma coated target is realized, and the application range is greatly expanded.
Description
technical field [0001] The invention relates to the technical field of electromagnetic scattering modeling, in particular to a near-field electromagnetic scattering modeling method for a plasma-coated target. Background technique [0002] The radar cross section is a physical quantity that quantitatively characterizes the scattering intensity of the target, that is, the effective scattering cross-sectional area of the target to the incident radar wave, usually referred to as the radar cross section (RCS) of the target, which is an imaginary area of the target. RCS analysis and prediction is based on various electromagnetic scattering theories to study the various mechanisms of the scattered field generated by the scene, and use various approximate calculation methods and computer technology to quantitatively estimate the electromagnetic scattering characteristics of the target. At present, the far-field RCS research on the target body has been gradually improved, while t...
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IPC IPC(8): G06F30/17G06F30/20
CPCG06F30/17G06F30/20Y02E30/10
Inventor 谢志杰贾洁姝高伟
Owner SHANGHAI RADIO EQUIP RES INST