论文部分内容阅读
本文利用提取直射波并结合自适应数字滤波等技术提出一种计算水平层状介质中电磁场并矢Green函数的快速算法.首先将谱域Green函数中表征均匀介质作用的直射波提取出来并对其积分进行解析计算,这种处理降低了谱域Green函数的奇异性,可在很大程度上缩短其积分收敛区间.然后在将谱域Green函数剩余部分对应积分转化为三个快速下降积分的基础上,引入一种自适应数字滤波算法对其进行快速求解.最后通过具体算例验证了本文所述算法的有效性.
In this paper, a fast algorithm for calculating the dyadic Green’s function of the electromagnetic field in horizontal layered media is proposed by using the technique of extracting direct waves combined with adaptive digital filtering.Firstly, the direct wave that characterizes uniform media in the spectral Green’s function is extracted and its Which can reduce the singularity of the spectral Green’s function and shorten the integral convergence interval.And then, the corresponding integral of the remaining part of spectral Green’s function is transformed into the basis of three fast descending integrals , An adaptive digital filtering algorithm is introduced to solve the problem quickly.Finally, a concrete example is given to verify the effectiveness of the proposed algorithm.