Thompson-FDTD方法中的兩步法
TWO-STEP S THOMPSON-FDTD METHOD
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摘要: 本文將流體力學領(lǐng)域的微分-Thompson變換與時域有限差分(FDTD)技術(shù)結(jié)合起來,所形成的Thompson-FDTD方法,首次用來計算和分析任意形狀介質(zhì)體的電磁散射特性。該方法至少具有兩個明顯的優(yōu)點:可以把不規(guī)則形體變換成規(guī)則形體,有利于精確匹配邊界條件;可以任意調(diào)配網(wǎng)格分布,有利于提高計算精度。其數(shù)值實現(xiàn)進一步證實了該方法能精確模擬任意形狀介質(zhì)目標的電磁散射過程。
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關(guān)鍵詞:
- Thompson變換; 時域有限差分; 任意形狀介質(zhì); 電磁散射
Abstract: This paper combines the differential-Thompson transformation involved in hydromechanics with the finite difference time domain (FDTD) technique to form Thompson-FDTD method. This method is applied by the first time to calculate the electromagnetic scattering properties of arbitrarily shaped dielectric objects. This method has at least two obvious advantages: It can transform arbitrary shaped bodies into regular structures and thus the boundary conditions are matched accurately; it can willfully dispose the grid distribution and thus better numerical accuracy is achieved. The numerical simulation further confirms its validity. -
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