Off-Grid Perfect BCs for the FDTD Method
نویسندگان
چکیده
This paper presents a method for implementing off-grid boundary conditions (BCs) within Yee’s Finite-Difference Time-Domain (FDTD) method, without disturbing the existing uniform mesh or changing the standard FDTD code. Both perfect electric conductor (PEC) and perfect magnetic conductor (PMC) walls are considered. The field values at off-grid virtual boundaries are obtained by extrapolation of adjacent field values. The method greatly enhances the flexibility of the FDTD method with respect to its ability to represent complex geometrical domains without reducing the spatial step.
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