复空间定位法──一种分析复波束散射的有效方法

The Method of Complex Ray Direction Determination──An Effecitent Method for Analyzing Complex Beam Scattering

本文提出的复空间定位法，可对目标散射的复射线轨迹进行复空间定位，并可用于分析目标对频域复源波束与对时政复源脉冲波束产生的空间散射场．这种方法不仅与成熟的复空间追踪法具有相同的精度，而且能将后者三维空间的四维未知量的求解降低到二维，将二维空间的二维未知量的求解降低到一维，还解决了复射线近轴近似理论遇到的困难，因而是一种行之有效的分析方法．作为实例，本文用复空间定位法分析计算了导体板、凸导体球与四导体半球壳对三维矢量复波束的空间散射场，结果与由复空间追踪法得到的数值解完全吻合．

This paper presents the method of complex ray direction determination, withwhich the trace of complex ray direction can be determined. And this method analyzes the scattering fields in space which are produced by the target for complex source beam in frequent domainand complex source pulsed beam in time domain. There is the same accuracy between this methodand the complex ray tracing method. Furthermore this method can reduce the unknown four-dimensional(4-D)variables of the latter to 2-D ones,and 2-D variables to l-D one. And this effecientmethod solves the problems that we face when using the complex ray poroxial approximationmethod. This paper also analyzes and calculates the scattering fields in space of conduct plate,conduct sphere and concave conduct half sphere shell for the 3-D vector complex source beam. The numerical results of this method completely agree with those of complex ray tracing method.