Calculation of the Electromagnetic Scattered Field and Radar Cross Section
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摘要: 计算了绕二维物体的时域电磁散射场的空间分布和雷达散射截面积 (RCS).通常的电磁场计算是频域的,采用高频计算方法,而流场计算是时域的.由于以研究流场——电磁场优化设计计算为目的,需要统一采用时域计算,因此重点采用矢通量分裂法这种时域方法计算了RCS ,通过将特征值分裂为正负两部分,抑制了各自的误差.此外,采用LaxWendroff方法作为对照.两种方法的结果一致.Abstract: The paper focus on the description of the dimensional distribution of the timedomain scattered electromagnetic field around a 2D body and Radar Cross Section ( RCS ).The calculation of electromagnetic field usually conforms with the frequencydomain.A high frequency calculation method is mainly adopted,the calculation of fluid field agrees with timedomain.For the purpose of optimization design computation combining of the fluid field and the electromagnetic field,an integrated timedomain scheme is required.By separating the representative value into positive and negative value,allowance errors can be hold down respectively,the timedomain fluxsplitting method is applied to calculation of RCS in comparison with LaxWendroff Scheme.Therefore,the final results of the two methods were consistent.
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Key words:
- radio wave scattering /
- optimization /
- radar
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