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首页> 外文期刊>Microwaves, Antennas & Propagation, IET >Improved quasi-analytic method for transient analysis of electrically large conducting targets illuminated by a complex source beam
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Improved quasi-analytic method for transient analysis of electrically large conducting targets illuminated by a complex source beam

机译:改进的准分析方法,用于复杂源光束照射下的大导电目标的瞬态分析

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摘要

A novel method based on time-domain physical optics (TDPO) is proposed to determine the transient response of electrically large conducting targets which are modelled with triangular facets. TD complex source beam (TDCSB) is used to illuminate the complex target. Different from plane wave, the propagation direction of CSB is not a line in real space. A fast shadowing technique based on Z-buffer algorithm is presented to determine the shadowed area of PO when TDCSB is adopted. Analytic time transform is utilised to investigate the analytic step response of a complex target. With an appropriate transform, the two-dimensional (2D) integral of TDPO can be reduced to 1D which is independent of electrical size. Since the tedious and time-consuming numerical integration in the conventional TDPO is avoided, this method has a significant superiority in terms of speed. Numerical results are showed in this study to demonstrate the efficiency of the proposed method.
机译:提出了一种基于时域物理光学(TDPO)的新方法来确定用三角形小平面建模的大导电目标的瞬态响应。 TD复合源光束(TDCSB)用于照亮复合目标。与平面波不同,CSB的传播方向不是真实空间中的线。提出了一种基于Z缓冲区算法的快速遮蔽技术,用于在采用TDCSB时确定PO的遮蔽区域。分析时间变换用于研究复杂目标的分析步骤响应。通过适当的变换,可以将TDPO的二维(2D)积分减小为1D,这与电气尺寸无关。由于避免了传统TDPO中繁琐且费时的数值积分,因此该方法在速度方面具有明显的优势。数值研究结果表明了该方法的有效性。

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