涂敷手征媒质的电大目标RCS仿真研究

涂敷手征媒质的电大目标RCS仿真研究

内容简介：手征媒质是一种新型的吸波材料,它是双各向同性媒质的一种.在手征媒质的本构关系中,手征参数有着非常重要的意义.采用非均匀有理B样条曲面建立目标模型,并将模型转化成易于计算的贝齐尔形式.然后,采用物理光学法计算了电大尺寸金属目标在涂敷手征媒质情况下的雷达散射截面.计算结果表明,不同的手征参数对涂敷目标的雷达散射截面有明显的影响,通过优化设计手征参数可使涂敷目标的雷达散射截面在一定的频率范围内明显减缩.

Abstract：Chiral medium is a new absorbing material,which is one kind of bi-isotropic medium.In the constitutive relation,the chiral parameter is very important.The target is modeled by non-uniform rational B-spline surfaces,and they are transformed into Bezier surfaces.Then,the radar cross section of a metallic target coated with chiral medium is calculated by the physical optics method.The results show that the different chiral parameters have different influence on the radar cross section of the coated target.When the chiral parameter is optimized,the radar cross section of the coated target will reduce obviously within a range of frequencies.

作者：吕丹, 童创明, 胡俊华,

关键词：雷达散射截面, RCS, 手征媒质, 非均匀有理B样条, 物理光学, 涂敷目标