%A Yanfang CHEN, Liwei WANG %T Higher order implicit CNDG-PML algorithm for left-handed materials %0 Journal Article %D 2021 %J Journal of Systems Engineering and Electronics %R 10.23919/JSEE.2021.000004 %P 31-37 %V 32 %N 1 %U {https://www.jseepub.com/CN/abstract/article_7870.shtml} %8 2021-02-25 %X

By incorporating the higher order concept, the piecewise linear recursive convolution (PLRC) method and Crank-Nicolson Douglas-Gunn (CNDG) algorithm, the unconditionally stable complex frequency shifted nearly perfectly matched layer (CFS-NPML) is proposed to terminate the left-handed material (LHM) domain. The proposed scheme takes advantages of CFS-NPML formulation, the higher order concept PLRC method and the unconditionally stable CNDG algorithm in terms of absorbing performance, computational efficiency, calculation accuracy and convenient implementation. A numerical example is carried out to demonstrate the effectiveness and efficiency of the proposed scheme. The results indicate that the proposed scheme can not only have considerable absorbing performance but also maintain the unconditional stability of the algorithm with the enlargement of time steps.