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Abstract In this paper, a fast simulation method based on non-uniform mesh model and high-frequency method is proposed to deal with the scattering of super electrically-large composite scenes. The composite scattering is departed into complex target scattering, rough background scattering and coupling scattering. For the scattering of targets, physical optics method and equivalent edge current method are used. For the scattering of background, the two-scale method modified scattering center model is utilized. For coupling scattering, the meshes which can produce coupling effect on target surface are encrypted, and the coupling scattering is solved with modified four-path model. Then the composite scattering features of a cube-sea model and complex tank-sand model are calculated. The results are compared with those from multi-layer fast multi-pole, the average error of radar cross section can be as good as 2.4 dB, and the efficiency is improved 104 times. The proposed method is helpful to break through the calculation bottleneck of super electrically large composite scene.
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Received: 13 April 2022
Published: 15 December 2022
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2022, Vol. 5 
