基于物理光学法的再入等离子体包覆体空间散射特性分析  

Analysis of the Spatial Scattering Characteristic for the Reentry Target Cloaked by Plasma Based on the Physical Optics Method

作　　者：常雨[1] 陈伟芳[2] 罗宁[1] 吴其芬[1] 

机构地区：[1]国防科学技术大学航天与材料工程学院,长沙410073 [2]浙江大学航空航天学院,杭州310027

出　　处：《微波学报》2008年第2期1-6,共6页Journal of Microwaves

摘　　要：建立十一组元模型,数值模拟再入体化学反应绕流流场,得到流场参数随再入高度、马赫数变化的分布特性。基于绕流流场,采用等效输入阻抗方法及分层介质模型,应用物理光学法计算再入等离子体包覆体雷达散射截面。分析流场特性变化对散射特性的影响。对电磁波在等离子体鞘套内传播特性及电磁波与等离子体相互作用机理进行了初步分析。计算结果对再入体目标识别、等离子体隐身及再入通信具有一定的参考价值。Numerical simulations of chemical reaction flow passing around the reentry target have been carried out with the eleven-element model. The distribution of flow parameters has been obtained for different reentry altitudes and Mach numbers. Based on the results of chemical reaction flow field, with the application of the input impedance method and muhilayered medium model, the RCS of the reentry target has been computed using the physical optics method. The effect of flow states on the scattering characteristic has been analyzed. The propagation characteristic of electromagnetic waves in plasmas and the interaction of electromagnetic waves with plasmas have been studied. The results are significant to the identification, the olasmas stealth and the communication of reentry targets.

关 键 词：十一组元 化学反应 输入阻抗 分层介质 物理光学法 等离子体隐身 再人体 雷达散射截面 

分 类 号：TN953[电子电信—信号与信息处理]