船海复合场景面元化快速电磁建模方法及SAR成像仿真

发布时间：2018-07-12 10:32

  本文选题：面元模型 + 图形电磁学　； 参考：《国防科技大学学报》2016年04期

【摘要】：在微波高频段,海面背景或海上船类目标往往具有电大尺寸和复杂精细的结构,这给船海复合场景的电磁建模带来巨大的计算负担。为简化计算,基于海面电磁散射模型面元化思想和图形电磁学,结合计算耦合场的四路径模型,提出一种电大尺寸船海复合场景电磁散射的快速计算方法。在保证海面与目标复合散射场的计算准确性前提下,提高计算效率。仿真并分析不同雷达参数下动态海面与目标的雷达散射截面,计算结果与实测数据以及精确数值方法结果的良好一致性验证了方法的准确性。将复合散射快速计算方法应用于合成孔径雷达成像仿真,仿真结果验证了方法的有效性。
[Abstract]:In the high frequency band of microwave, the sea surface background or the marine ship type target often has the electrically large size and the complex fine structure, which brings the huge computational burden to the electromagnetic modeling of the ship-sea composite scene. In order to simplify the calculation, a fast calculation method for electromagnetic scattering from electrically large scale ship-sea composite scenes is proposed based on the surface element method of sea surface electromagnetic scattering model and graphic electromagnetics, combined with the four-path model of coupled field calculation. The computational efficiency is improved on the premise of ensuring the accuracy of the complex scattering field between the sea surface and the target. The radar cross sections of dynamic sea surface and target under different radar parameters are simulated and analyzed. The accuracy of the method is verified by the good consistency of the calculated results with the measured data and the accurate numerical results. The fast calculation method of complex scattering is applied to synthetic Aperture Radar (SAR) imaging simulation, and the simulation results verify the effectiveness of the method.
【作者单位】： 西安电子科技大学物理与光电工程学院;
【基金】：国家自然科学基金资助项目(61372004,41306188)
【分类号】：U675.74;TN957.52
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本文编号：2116865