基于PO-PTD优化方法的厢式车辆电磁散射特性研究

doi:10.12305/j.issn.1001-506X.2024.12.07

Abstract

Abstract:

The fast and accurate calculation and analysis method for the electromagnetic scattering characteristics of electrically large targets is an important means to improve the ability to extract target feature information. The scattering field of vehicle targets is mainly contributed by the combined effects of reflection and diffraction. Therefore, the physical theory of diffraction (PTD) is adopted to introduce the edge diffraction effect to improve the physical optics (PO) method, thereby establishing a PO-PTD combined high-frequency approximate optimization calculation method for electromagnetic scattering models of electrically large and complex targets. Furthermore, the electromagnetic scattering problem of electrically large van vehicle targets is analyzed by the proposed PO-PTD optimization method, and the response characteristics of radar cross section (RCS) circumferential distribution to frequency and grazing angle are studied. The electromagnetic scattering characteristics of vehicle in all directions are closely related to their corresponding structural shapes, involving multiple effects such as large-plane mirror reflection, dihedral angle reflection, and edge diffraction. The distribution curve of vehide RCS shows a trend of expansion and then reduction as the grazing angle increases, and a trend of reduction with increasing frequency. The front and rear of the vehicle are most sensitive to changes in the grazing angle and are the dominant factors affecting the shape's variation of the RCS curve. This study can provide a key technical foundation for the electromagnetic scattering characteristics of evaluation and control of electrically large and complex targets.

Key words: electromagnetic scattering characteristic, vehicle target, physical optics (PO), physical diffraction, response characteristic

CLC Number:

TN011

Long WANG, Liuying WANG, Gu LIU, Chaoqun GE, Ying ZHANG, Wenhao WANG, Lingjie HU, Haiqing CHEN. Electromagnetic scattering characteristic of van vehicle based on PO-PTD optimization method[J]. Systems Engineering and Electronics, 2024, 46(12): 3992-3999.

Figures/Tables 8

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Electromagnetic scattering characteristic of van vehicle based on PO-PTD optimization method

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