Nonstandard Finite Difference Time Domain Algorithm for Berenger’s Perfectly Matched Layer
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Nonstandard Finite Difference Time Domain Algorithm for Berenger’s Perfectly Matched Layer摘要
The nonstandard (NS) finite difference time domain (FDTD) algorithm provides remark- ably high accuracy on a coarse grid by optimiz- ing to monochromatic wave propagation within each uniform region. But, an effective absorb- ing boundary condition (ABC) is also necessary to accurately calculate electromagnetic fields. Al- though Berenger’s perfectly matched layer (PML) is a highly effective ABC, there is still no NS- formulation of it. In this paper, we develop a NS- version of the PML (NS-PML). We compare the NS-PML with other ABCs and demonstrate its excellent absorption.
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