Method of moments analysis of a waveguide crossed slot by using the eigenmode basis functions derived by the edge-based finite-element method
Method of moments analysis of a waveguide crossed slot by using the eigenmode basis functions derived by the edge-based finite-element method
复制标题
利用边缘有限元法导出的本征模基函数进行波导交叉槽矩分析方法
DOI：
10.1049/ip-map:20000709
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
M. Ando
中科院分区：
文献类型：
--
作者：
T. Hirano;J. Hirokawa;M. Ando
提出了一种矩量法和有限元法的混合分析方法，用于波导交叉缝隙的分析。X形波导的本征模函数，在横截面中的交叉槽的几何形状，被用作在矩量法中的磁流的基函数。它们通过基于边缘的有限元法导出为矢量，以准确地表达交叉部分周围的电流流动。由于本征模的正交性，矩形波导壁厚区的反应可以简单而准确地计算，而无需进行模求和。所提出的方法是有利的交叉槽，特别是与宽槽宽和厚波导壁。为了验证的分析，传输系数的计算结果，和辐射方向图进行了比较与使用12 GHz的模型天线的测量。从10到15 GHz的传输系数的协议是非常好的幅度和相位。
A hybrid analysis of the method of moments (MoM) and the finite-element method (FEM) is proposed for a waveguide crossed slot. The eigenmode functions of an X-shaped waveguide, with the geometry of a crossed slot in the cross section, are utilised as the basis functions of the magnetic currents in the MoM. They are derived as vectors by the edge-based FEM to express the current flow accurately around the crossing part. Reactions in the wall-thickness region of the rectangular waveguide can be simply and accurately evaluated without taking mode summation because of the orthogonality of the eigenmodes. The proposed method is advantageous for a crossed slot, especially with a wide slot width and a thick waveguide wall. For the verification of the analysis, the calculated results of the transmission coefficient, and the radiation pattern are compared with the measured ones using a 12 GHz model antenna. The agreement in the transmission coefficient is very good both in amplitude and phase from 10 to 15 GHz.