Numerical Analysis of Electromagnetic Scattering From a Moving Target by the Lorentz Precise Integration Time-Domain Method

Numerical Analysis of Electromagnetic Scattering From a Moving Target by the Lorentz Precise Integration Time-Domain Method
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洛伦兹精密积分时域法数值分析动目标电磁散射

DOI:
10.1109/tap.2017.2742540
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发表时间:
2017-10
影响因子:
5.7
通讯作者:
Kang Zhen
Kang Zhen
中科院分区:
计算机科学2区
文献类型:
--
作者:
Shao Jinghui;Ma Xikui;Kang Zhen

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提出了一种新的数值方法,称为Lorentz精细积分时域方法(Lorentz-PITD),用于处理运动导体板的散射问题。该方法同时使用了覆盖网格生成技术和洛伦兹变换。利用洛伦兹变换和线性内插技术,将静止坐标系中的入射平面波引入到运动坐标系中,将散射场从运动坐标系变换到静止坐标系。数值实验验证了Lorentz-PITD方法的有效性,表明Lorentz-PITD方法比Lorentz有限差分法具有更高的计算效率。随之而来的一个发现是,在所提出的方法中,必须在适用的频率范围和计算成本之间进行权衡。
A novel numerical method, referred to as Lorentz precise integration time-domain (Lorentz-PITD) method, is proposed to deal with the scattering problem from a moving conducting slab. Both the overset grid generation technique and the Lorentz transformation are employed in this method. By using the Lorentz transformation and the linear interpolation technique, the incident plane wave in the rest frame is introduced to the moving frame; the scattered fields are transformed from the moving frame to the rest frame. Numerical experiments validate the Lorentz-PITD method and show that the Lorentz-PITD method is more computationally efficient compared with the Lorentz finite-difference time-domain method. An accompanied find is that there must be a tradeoff between the applicable frequency range and the computation cost in the proposed method.
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