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International Journal of Antennas and Propagation
Volume 2018, Article ID 8267504, 7 pages
https://doi.org/10.1155/2018/8267504
Research Article

The Application of Improved Spherical Harmonics Expansion-Based Multilevel Fast Multipole Algorithm in the Solution of Volume-Surface Integral Equation

1School of Information Engineering, Communication University of China, Beijing 100024, China
2School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China

Correspondence should be addressed to Mang He; nc.ude.tib@gnameh

Received 27 November 2017; Accepted 1 March 2018; Published 11 April 2018

Academic Editor: Paolo Burghignoli

Copyright © 2018 Jinbo Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

During the solution of volume-surface integral equation (VSIE), to reduce the core memory requirement of the radiation patterns (RPs) of the basis functions, an improved spherical harmonics expansion-based multilevel fast multipole algorithm (SE-MLFMA) using the mixed-potential representation and the triangle-/tetrahedron-based grouping scheme is applied. Numerical results show that accompanying with a faster speed, the memory requirement of the RPs in the improved SE-MLFMA is several times less than that in the conventional MLFMA without compromising accuracy. A result employing the OpenMP parallelization and vector arithmetic logic unit (VALU) hardware acceleration technique is also shown to illustrate the robustness and scalability of the improved SE-MLFMA method.