用CAD技术实现复杂目标FDTD方法几何-电磁建模  

Using CAD Technique to Realize the Geometric-Electromagnetic Modeling of the FDTD Calculation of Complex Objects

作　　者：李明之[1] 刘友健 王长清[1] 徐承和[1] 

机构地区：[1]北京大学电子学系,北京100871

出　　处：《电子学报》1999年第3期131-133,共3页Acta Electronica Sinica

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．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.

关 键 词：FDTD CAD 雷达散射截面 电磁散射 复杂目标 

分 类 号：TN957.52[电子电信—信号与信息处理] O441.4[电子电信—信息与通信工程]