Exponential time differencing based efficient SC-PML for RCS simulation  

作　　者：NIU Liqiang XIE Yongjun JIANG Haolin WU Peiyu 

机构地区：[1]School of Electronic and Information Engineering,Beihang University,Beijing 100191,China [2]School of Information Science and Engineering,Southeast University,Nanjing 210096,China

出　　处：《Journal of Systems Engineering and Electronics》2020年第4期703-711,共9页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(61571022;611971022)。

摘　　要：To efficiently simulate and calculate the radar cross section(RCS) related electromagnetic problems by employing the finite-difference time-domain(FDTD) algorithm, an efficient stretched coordinate perfectly matched layer(ESC-PML) based upon the exponential time differencing(ETD) method is proposed.The proposed implementation can not only reduce the number of auxiliary variables in the SC-PML regions but also maintain the ability of the original SC-PML in terms of the absorbing performance. Compared with the other existed algorithms, the ETDFDTD method shows the least memory consumption resulting in the computational efficiency. The effectiveness and efficiency of the proposed ESC-PML scheme is verified through the RCS relevant problems including the perfect E conductor(PEC) sphere model and the patch antenna model. The results indicate that the proposed scheme has the advantages of the ETD-FDTD method and ESC-PML scheme in terms of high computational efficiency and considerable computational accuracy.

关 键 词：exponential time differencing(ETD) efficient stretched coordinate(ESC) finite-difference time-domain(FDTD) perfectly matched layer(PML) radar cross section(RCS) 

分 类 号：TN95[电子电信—信号与信息处理]