We present an efficient strategy for reducing the memory requirement for the near-field matrix in the multilevel fast multipole algorithm (MLFMA) for solving multiscale electromagnetic (EM) scattering problems. A multiscale problem can obviously lower the storage efficiency of the MLFMA for the near-field matrix. This paper focuses on overcoming this shortcoming to a certain extent. A hybrid tree structure for the MLFMA that possesses two kinds of bottom-layer boxes with different edge sizes will be built to significantly reduce the memory requirement for the near-field matrix in the multiscale case compared with the single-tree-structure technique. Several numerical examples are provided to demonstrate the efficiency of the proposed scheme in the multiscale EM scattering. © 2014 Wei-Bin Kong et al.
CITATION STYLE
Kong, W. B., Zhou, H. X., Li, W. D., Hua, G., & Hong, W. (2014). The MLFMA equipped with a hybrid tree structure for the multiscale em scattering. International Journal of Antennas and Propagation, 2014. https://doi.org/10.1155/2014/281303
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