用于不连续特征电磁散射计算的新方法

从有限实验结果出发,提出了半实测法,该方法通过合理假设和简单计算,可计算出更多、更复杂不连续特征的散射特性.其基本假设是带有不连续特征的平板的电磁散射可由各部分的散射按相位叠加而成,包括以下三部分:带有不连续特征的平板的散射是由不连续特征的散射与平板的散射叠加而成;多个不连续特征的散射由单个不连续特征的散射按相位叠加而成;不连续特征的散射与其尺寸成正比.该方法可根据有限的实测结果来预估其它情况下带有不连续特征的平板的散射,具有计算效率高、占用内存小、工程实用强的特点.通过对台阶板、缝隙板的半实测法计算验证,证明了该方法的高效性.

Novel method for computing electromagnetic scattering from discontinuous characters

The half-measurement method is used to calculate the more complex discontinuous character which is based on limited experiments through several hypotheses and computations.The base hypothesis of the half-measurement method is that the scattering of plate with the discontinuous character is a superposition at different phases by the scattering of different components.The half-measurement method includes three hypotheses:the first hypothesis is that the scattering of plate with the discontinuous character is the scattering superposition of the plate and the discontinuous character;the second hypothesis is that the scattering of multi-discontinuous character is the summation of the scattering of all single-discontinuous character at different phases;the third hypothesis is that the scattering of discontinuous character is directly proportional to its size.This method can be used to estimate the other scattering of plate with the discontinuous character and has some advantages like high efficiency and less memory occupation.Through the research on multi-step plate and multi-gap plate,the method is proved to be valid.