摘要
雷达静态目标的电磁散射特性可用成熟的电磁计算方法精确求解,动态目标则需在准静态原理假设下近似计算;基于Maxwell方程组和入射电磁场边界条件在雷达参考系和目标参考系相互转换规律,在目标参考系中构建了动态电磁散射问题的精确数学形式——非均匀边界条件下的Maxwell方程求解问题;随后讨论了准静态近似的理论依据,指出其适用范围局限于非相对论速度的动态目标。
The EM scattering properties of static radar targets can be calculated accurately with mature computational EM methods,while dynamic targets are approximated under the quasi-static principle. Based on the transformation of Maxwell’s equations and electromagnetic field boundary condition between radar reference frame and target reference frame,a mathematical of dynamic EM scattering problem,the so-called Maxwell’s equations problems with non-uniform boundary condition,was put forward in target reference frame. Besides,the theoretical basis of quasi-static approximation was discussed,and we pointed out that it is appropriate for target with sub-relativistic velocity.
出处
《四川兵工学报》
CAS
2015年第11期138-140,共3页
Journal of Sichuan Ordnance
关键词
刚体运动
电磁散射
参考系转换
准静态原理
rigid motion
EM scattering
reference frame transformation
quasi-static principle
