Affiliations: [a] Hefei University Of Technology, Hefei, Anhui, China | [b] Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu, China | [c] State Key Laboratory of Millimeter Waves, Nanjing, Jiangsu, China
Correspondence:
[*]
Corresponding author: Zhaoneng Jiang, Hefei University Of Technology, Hefei 230009, Anhui, China. E-mail:jiangzhaoneng@hfut.edu.cn
Abstract: In this paper, an efficient hybrid algorithm is
proposed to analyze the large-scale electromagnetic scattering and radiation
problems. It utilizes the adaptive cross approximation (ACA) algorithm to
form the impedance matrix for interactions inside a subdomain, while the
impedance matrix for interactions belongs to different subdomains is
calculated by multilevel fast multipole method (MLFMM). The direct solver
based on multilevel compressed block decomposition (MLCBD) is utilized to
solve the matrix equation for each subdomain which is called as the inner
iteration. Due to its negligible extra cost for the new excitation, the
proposed hybrid algorithm is especially efficient for analyzing
electromagnetic scattering problems with multiple incident fields
(monostatic scattering computations). Numerical examples are presented to
demonstrate its validity and efficiency.
Keywords: Multilevel compressed block decomposition (MLCBD), method of moment (MoM), overlapped domain decomposition method (ODDM), electromagnetic scattering
