[数值]5[FDTD][Taflove-2002]Efficient modeling of infinite scatterers using a generalized....

Efficient modeling of infinite scatterers using a generalized total-field/scattered-field FDTD boundary partially embedded within PML eX;"kO  
Anantha, V.   Taflove, A.   Y7!,s-v4W  
Adv. Radio Technol., Motorola Inc., Arlington Heights, IL; >E[cl\5$E  
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This paper appears in: Antennas and Propagation, IEEE Transactions on Rz*%(2Vz  
Publication Date: Oct 2002 80axsU^H0  
Volume: 50,  Issue: 10 bWjW_$8  
On page(s): 1337- 1349 spd>.Cm`  
ISSN: 0018-926X Tx],- U  
INSPEC Accession Number: 7486269 >|uZIcs 6  
Digital Object Identifier: 10.1109/TAP.2002.804571 OW1[Y-o[  
Current Version Published: 2003-01-06 ]7c715@  

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Abstract y*|"!FK  
This paper proposes a novel generalized total-field/scattered-field (G-TF/SF) formulation for finite-difference time-domain (FDTD) to efficiently model an infinite material scatterer illuminated by an arbitrarily oriented plane wave within a compact FDTD grid. This requires the sourcing of numerical plane waves traveling into, or originating from, the perfectly matched layer (PML) absorber bounding the grid. In this formulation, the G-TF/SF wave source boundary is located in part within the PML. We apply this technique to efficiently model two-dimensional (2D) transverse-magnetic diffraction of an infinite right-angle dielectric wedge and an infinite 45°-angle perfect-electrical-conductor wedge. This approach improves the computational efficiency of FDTD calculat .. +r4^oT[-  
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