| 一种改进的快速计算多层媒质闭式格林函数的直接DCIM |
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| 引用本文： | 覃开云,尹成友,熊俊卿.一种改进的快速计算多层媒质闭式格林函数的直接DCIM[J].安徽大学学报(自然科学版),2009,33(4). |
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| 作者姓名： | 覃开云 尹成友 熊俊卿 |
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| 作者单位： | 解放军电子工程学院,信息工程系,安徽,合肥,230037 |
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| 基金项目： | 国家自然科学基金资助项目(60671057) |
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| 摘 要： | Somm erfeld积分是计算多层媒质空域格林函数必须首先解决的问题,该文提出一种对直接DC IM的改进方法,与传统的一级和二级DC IM相比,这种方法求解得到的空域格林函数在近场区、中间场区和远场区都是准确的,并且不用提取准动态项和表面波分量,从而克服了传统DC IM提取这些项的困难.与直接DC IM相比,这种方法将直接DC IM中第一级近似采用的路径一分为二,在不同的路径上采用不同的采样参数,从而在不降低计算精度的前提下,通过减少总的采样点数,有效地减少计算量,缩短CPU时间,达到快速计算格林函数的目的.通过对微带结构格林函数的计算,数值仿真结果与相关文献吻合很好,证实了该方法的正确性.
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| 关 键 词： | 格林函数 Sommerfeld积分 直接离散复镜像法 增强离散复镜像法 多层媒质 |
An improved direct DCIM for fast calculation of the closed-form Green's functions in multilayered media |
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| QIN Kai-yun,YIN Cheng-you,XIONG Jun-qing.An improved direct DCIM for fast calculation of the closed-form Green''s functions in multilayered media[J].Journal of Anhui University(Natural Sciences),2009,33(4). |
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| Authors: | QIN Kai-yun YIN Cheng-you XIONG Jun-qing |
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| Institution: | Department of Information Engineering;Electronic Engineering Institute of PLA;Hefei 230037;China |
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| Abstract: | Sommerfeld integration was the key problem which need to be solved in calculating the spatial-domain Green's functions(GF) in multilayered media.In the paper,an improved direct DCIM was proposed.Compared with the traditional one-level and two-level DCIM,the spatial-domain GF obtained by the method was accurate both in the near,intermediate and far-field regions without any quasi-dynamic and surface-wave extraction.So the difficulty the traditional DCIM had in extracting those quantities was overcome.Compare... |
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| Keywords: | Green's functions(GF) Sommerfeld Integration(SI) direct DCIM(D-DCIM) enhanced DCIM(E-DCIM) muhilayered media |
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