Characteristic Mode Decomposition of Scattering Dyadic

M. Capek, Johan Lundgren, M. Gustafsson, L. Jelínek, K. Schab
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Abstract

This abstract describes the decomposition of a matrix representing a scattering dyadic into characteristic modes. Scattering dyadic, as compared to conventionally used impedance matrices, are independent of numerical method used to compute them and the same characteristic mode formulation can be used for decomposition of composite and inhomogeneous materials. The utilization of scattering dyadic makes it possible to synthesize characteristic modes which are orthogonal over prescribed portions of the far-field sphere, or ex-post decomposition of measured data. The theory is demonstrated on a simple example and its features are discussed.
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散射并矢的特征模态分解
摘要描述了将表示散射二矢的矩阵分解为特征模式。与传统使用的阻抗矩阵相比,散射二元矩阵与计算它们的数值方法无关,并且可以使用相同的特征模态公式来分解复合材料和非均匀材料。利用散射二矢可以合成在远场球的规定部分上正交的特征模,也可以对测量数据进行事后分解。通过一个简单的实例对该理论进行了论证,并对其特点进行了讨论。
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