Rapid calculation method for electromagnetic scattering of ultra-high-speed target in thin atmosphere

Abstract

The invention discloses a rapid calculation method for electromagnetic scattering of an ultra-high-speed target in a thin atmosphere. The rapid calculation method comprises the steps of: plasma equivalent layered medium model modeling, which is implemented by analyzing streaming flow field data f a hypersonic speed target by utilizing an isotimic-surface extraction algorithm, and establishing a plasma equivalent layered medium model; ray tracing and field intensity tracing in layered media, wherein the tracking is implemented by simulating the propagation process of electromagnetic waves in the layered media by utilizing rays, performing field intensity tracing along propagation paths of the rays, and acquiring electric field information of the rays at intersection points in the layered media; and modeling of a far-region scattering field for a layered media coated target, wherein the modeling is implemented by modeling electromagnetic scattering features of a multilayer-medium-coatedtarget by adopting an shooting and bouncing ray method in the case of high-frequency electromagnetic wave incidence, calculating scattering contributions of emergent rays in the direction of a radar receiver by utilizing a physical optics method for the emergent rays, and acquiring a total scattering field and RCS information. The rapid calculation method has the advantage of expanding 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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