【摘要】 FDTD方法是近年来得到广泛研究和应用的数值方法，具有许多无可比拟的优越性．CAD技术的介入使FDTD方法向实用化方向迈出了一大步．本文介绍如何使用CAD软件，基于复杂目标的设计图、剖面线图等描述方式，生成提供给FDTD计算程序使用的目标的几何-电磁参量描述文件．本文借助该方法计算了一种飞机在谐振区的RCS．更多还原

【Abstract】 FDTD method has been widely studied and applied in the recent years. It has many advantages over other numerical methods. When CAD technique gets involved,FDTD method makes a large pace toward its practicableness. In this paper,we introduce how to use CAD software to generate the original geometreic-electromagnetic parameter description file provided to the FDTD calculation code to solve the electromagenetic scattering problem of those objects with complex geometric shape and electromagnetic parameter distribution. Using this technique, we can get the geometric-electromagnetic parameter description file from the design drawing, sectional drawing or other ways of description of the objects. As an example, a kind of plan’s RCS in the resonance frequency was calculated.更多还原