A Fast Calculation Method for Electromagnetic Scattering of Ultra-High-Speed ​​Targets in Thin Atmosphere

Abstract

The invention discloses a fast calculation method for electromagnetic scattering of an ultra-high-speed target in a thin atmosphere, which includes the following process: modeling a plasma equivalent layered medium model, and analyzing the flow field data of a hypersonic target by using an isosurface extraction algorithm , to establish a plasma equivalent layered medium model; ray tracing and field intensity tracing in a layered medium, use rays to simulate the propagation process of electromagnetic waves in a layered medium, and perform field intensity tracing along the ray propagation path to obtain ray The electric field information of each intersection position in the multilayer medium; the far-field scattering field modeling of the target covered by the layered medium, in the case of high-frequency electromagnetic wave incident, the electromagnetic scattering characteristics of the target covered by the multilayer medium can be analyzed by using the bouncing ray method Carry out modeling; for the outgoing ray, use the physical optics method to solve its scattering contribution in the direction of the radar receiver, and obtain the total scattering field and RCS information. The invention has the advantage of widening the range of applicability.

Description

technical field [0001] The invention relates to the field of radar target characteristic modeling, in particular to an electromagnetic scattering modeling method for a plasma-coated target in a thin atmosphere. 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 ultra-high-speed target in the thin atmosphere needs to b...

AI Technical Summary

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, the refraction of electromagnetic waves in the plasma is not considered, and the influence of the non-uniform characteristics of the plasma sheath is not considered

Therefore, the applicability of prior art solutions is greatly limited

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