散射体面电流矩量法分析结果的彩色云图生成方法

以矩量法(MOM)求解出的多天线--散射体系统中散射体的面电流为基础,研究了面电流彩色云图的生成方法,它包括面单元(三角形、四边形)离散、面单元内电流的插值计算、电流数值与颜色的映射、云图的生成与动态显示.为达到对云图精度的控制以及能产生质量好的离散元,提出了质心--中点法;针对四边形单元内电流的插值,推导出一组双线性插值计算式;考虑到面电流数值小的特点,通过对电流值取对教建立了电流数值与颜色的映射;基于通用图形平台和AVI技术,实现了云图的动态显示.实践表明,文中给出的方法能反映出面电流的分布以及随时间变化的情况,具有满意的可视化效果.

Methods for the Generation of Color Map of the Scatter Body's Surface Current Based on the MOM Result

On the basis of the surface current in the multi-antennae and scatter body system solved by MOM, this paper makes a study of the methods for the generation of the color map of the surface current. The methods include dispersing the flat elements(e.g. triangle, quadrangle), computing current interpolation, mapping current value vs color, drawing the map and displaying it dynamically. The centroid-midpoint method is presented to control the map precision and produce better dispersing units. On the basis of the current interpolation of the quadrangle elements, this paper develops the computing expressions for bidirectional linear interpolation. Given the small values of surface current, the mapping of current value vs color is built by evaluating the logarithm of current value. The map is displayed dynamically by the universal graphics platform and AVI techniques. Examples show that these methods have better visualization effect.