Estimation of Equivalent Current Distribution Using Fourier Transform and Eigenmode Currents
Estimation of Equivalent Current Distribution Using Fourier Transform and Eigenmode Currents
复制标题
使用傅里叶变换和本征模电流估计等效电流分布
DOI：
10.1109/temc.2022.3172137
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
and Q. Chen
中科院分区：
文献类型：
--
作者：
K. Mochiki;K. Konno;and Q. Chen
当实际电源的精确几何形状未知时，等效电流分布的估计是一个挑战。在这项研究中，提出了一种新的等效电流分布估计方法。该方法是等效源的傅里叶变换和本征模电流的混合。使用所提出的方法估计等效电流分布如下。首先，将傅里叶变换应用于电场积分方程，并根据实际电源的近场数据估计特定估计平面上的初始等效电流分布。利用初始等效电流源分布，对均匀分布在估计面上的等效源进行细化。然后，利用矩阵方程和剩余等效源的本征模式电流估计等效源的电流分布。该方法的优点如下。首先，在估计过程中不需要真实源的精确几何形状。其次，减少了等效源的个数，使等值电流分布的估计具有良好的条件。该方法的性能得到了数值和实验的验证。给出了细化等效源阈值的经验准则。
The estimation of the equivalent current distribution is a challenge when the precise geometry of the real source is unknown. In this study, a novel estimation method for the equivalent current distribution is proposed. The proposed method is a hybrid of the Fourier transform and eigenmode currents of equivalent sources. The equivalent current distribution is estimated using the proposed method as follows. First, the Fourier transform is applied to an electric field integral equation, and the initial equivalent current distribution on a specific estimation plane is estimated from the near-field data of the real source. Utilizing the initial equivalent current distribution, the equivalent sources that are uniformly arranged over the estimation plane are thinned. Subsequently, the equivalent current distribution is estimated using a matrix equation and the eigenmode currents of the remaining equivalent sources. The advantages of the proposed method are as follows. First, the precise geometry of the real source is not needed during estimation. Second, the number of equivalent sources is reduced, and the estimation of the equivalent current distribution is well conditioned. The performance of the proposed method is validated both numerically and experimentally. Empirical guidelines for threshold values for thinning equivalent sources are provided.