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所属单位：电子信息工程学院
发表刊物：RADIOENGINEERING
关键字：Late-time instability DGTD elongated multilayer thin plate hybrid boundary conditions
摘要：In this article, we examine the late-time instability properties of hybrid boundary conditions in the discontinuous Galerkin time-domain (DGTD) simulations of an elongated multilayer thin plate. The hybrid boundary is combined by uniaxial perfectly matched layer (UPML) and periodic boundary condition (PBC). Herein, the PBC is employed to approximate an infinite long target. For the target studied, when implementing the UPML within the discrete DGTD domain, late-time instabilities would occur. This instable or spurious information can severely corrupt the solution of a physical problem in time domain. To suppress them, two effective ways are proposed, i.e., increasing the size of the air space (the distance away from the interface between the target studied and the UPML) and decreasing the conductivity of the UPML. The numerical experiments verify that the instability characteristics can be efficiently attenuated by two methods proposed in this paper.
ISSN号：1210-2512
是否译文：否
发表时间：2019-04-01
合写作者：Li, Huiping,Wang, Yi,曹群生
通讯作者：王一平