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Characteristic Mode-Based Efficient Broadband Electromagnetic Scattering Analysis Method for Array Structures
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DOI：10.1109/LGRS.2022.3218411.png)
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Abstract
En 中文
A fast and accurate numerical method based on the theory of characteristic modes (TCM) is proposed for analyzing electromagnetic scattering from repetitive multiscale array structures. In order to overcome the low-frequency breakdown problem when interacting at short distances between observation and source basis functions, the characteristic modes (CMs) are extracted from the impedance matrix generated by the augmented electric field integral equation (AEFIE), which is discretized by the method of moments (MoM). Then, the CMs of a single unit are used as the global basis functions to reduce the unknowns of the array structures. In addition, the broadband multilevel fast multipole algorithm (MLFMA) based on approximate diagonalization of Green's function is implemented to accelerate the matrix-vector multiplications between the impedance matrix and CM vectors. Several numerical examples are given to demonstrate the high efficiency and accuracy of the proposed scheme.
Keywords:
Array structures
characteristic mode (CM)
low frequency
multiscale structures
scattering
Journal
IF:
16.4
Papers:
1.0W
Citations:
5.1K
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