摘要
雷达目标的角闪烁及ＲＣＳ的计算，过去采用的方法是用各种简单形状的物体来近似目标的各个部件，再用几何光学法计算这些典型体的ＲＣＳ值。这种方法的明显的缺点是计算的模型与实际目标外形的差别较大，而用几何光学法计算目标散射场，又受到诸多的限制。本文提出的板块元的算法，是用一系列小的平面板元逼近目标外形，使计算模型建立的较为准确，另外，给出了计算任意多边形平板散射场的简化公式，把积分运算化成代数运算。克服了几何光学法只能计算具有双曲率表面的缺点，同时具有计算准确和速度快的优点。
Target glint and Radar Cross Section(RCS)have been generally analysed on the ba-sis of ray─optics method,and target is resolved into a lot of components,each of which can be geometrically approximated by a simple shape body,such as ellipsoid,clliptical plate, cylinder.How-ever,there is much more error between simple body and configration of target in the analysis.Also ray─optics can meet some limitations in practical application,In this paper,a new method called planar element method is proposed,and a set of small planar element is adopted to approximate the target,so the difference between the computing model and target is very little. Because the scattering field ofeach small planar element can be estimated by an algbraic expression, this method not only overcomes the defect of ray─optics method which only calculates scattering field of the surface with double curvature, but also holds the advantage of speeding and accuracy.
出处
《系统工程与电子技术》
EI
CSCD
1995年第2期14-20,37,共8页
Systems Engineering and Electronics
