A Versatile Split-Field 1-D Propagator for Perfect FDTD Plane Wave Injection

作者：Hadi Mohammed F^*

来源：IEEE Transactions on Antennas and Propagation, 2009, 57(9): 2691-2697.

DOI：10.1109/TAP.2009.2027171

• Finite-difference time domain (FDTD) sources
• finite-difference time-domain (FDTD) method
• high-order finite-difference time-domain (FDTD) methods
• numerical dispersion
• plane waves
• total-field/scattered-field

A new staggered field design and formulation for the one-dimensional propagator of the total-field/scattered-field source implementation in finite-difference time domain (FDTD) scattering simulations are presented. The new equations are based on split-field Maxwell's equations and the resulting technique extends the functionality of the multipoint auxiliary propagator to sourcing FDTD lattices hosting extended-stencil high-order algorithms. This technique virtually eliminates numerical dispersion, field location and polarization mismatches between propagator and main grid. The resulting machine accuracy-level leakage error from implementing this technique is confirmed for the standard low and high-order FDTD schemes as well as the M24 high-order algorithm. Normalized field leakage for all three algorithm implementations outside the total-field region was measured at below -295 dB.

• 出版日期2009-9