基于高阶矩量法的电大尺寸物体电磁场分析计算

摘要

The high-order moment method is used to analyze and calculate the antenna electromagnetic field of electrically large size objects.With high-order polynomials as the basis function and via reasonably adjusting the order of polynomials,the requirements of the traditional moment method for grid side length of the model can be expanded to about one electromagnetic wavelength.In general,only about 20 basis functions are needed to describe the electromagnetic flow of a square-wavelength target,which greatly reduces the unknown quantity and decreases the matrix size of the traditional moments method,that is of important practical significance.%主要运用高阶矩量法对电大尺寸物体下的天线电磁场进行分析计算.采用高阶多项式作为基函数,通过合理调整多项式的阶数,可将传统矩量法对模型网格边长的要求放宽到1个波长左右.一般情况只需要约20个基函数,就可以描述一个平方波长目标的电磁流,大大减少了未知量数目,降低了传统矩量法的矩阵规模,从而有效克服了分析电大问题普遍遇到的计算机内存不足的问题,很好地解决了实际工程问题,具有重要的实用意义.