基于天线辐射方向特性的射线跟踪加速算法

Ray Tracing Acceleration Algorithm Based on AntennaRadiation Pattern

针对正向射线跟踪问题,提出了一种射线管的生成方案,将射线管的生成巧妙地转化为线段的等分,极大地降低了射线管划分的复杂度。同时,给出了一套格点和网格对应关系的计算方法,便于实现网格筛选及计算网格的几何参量。在此基础上,结合天线辐射方向特性选择跟踪射线管的数量,提高了计算的效率。数值结果表明,该算法对方向性较强的天线的正向跟踪计算具有显著的加速效果。

For the forward ray tracing problems,the generation scheme of the ray- tube is proposed,which can simplify the meshing procedure and extremely reduce its complexity. Then,a method for computing the relation between points and grids is given,which can easily choose the required grids and grid points out and compute their geometric parameters. In conjunction with the antenna radiation pattern,the computing efficiency is improved by selecting ray-tubes satisfying the calculation requirements. Finally,numerical results show that the algorithm can greatly promote the calculation efficiency of forward ray-tube tracing for antennas possessing good directivity.