Pulsed beam diffraction by a perfectly conducting wedge: exact solution
Pulsed beam diffraction by a perfectly conducting wedge: exact solution
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完美导电楔块的脉冲束衍射：精确解
DOI：
10.1109/8.320743
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发表时间：
1994
影响因子：
5.7
通讯作者：
E. Heyman
中科院分区：
文献类型：
--
作者：
R. Ianconescu;E. Heyman
精确分析并解决了完美传导楔散射准直脉冲光束（PB）的新典型问题。事件 PB 由所谓的复杂源 PB (CSPB) 建模。作者推导了散射场的精确封闭式解，并通过大量数值示例证明了局部散射现象作为 PB 参数（方向、距边缘的距离、空间准直和脉冲长度）的函数：如果 PB 撞击边缘附近，则会生成沿凯勒锥体传播的环形衍射波包以及过渡阴影边界效应。这些衍射现象随着撞击波包距边缘的距离的增加而减弱。 >
The new canonical problem of scattering of a collimated pulsed beam (PB) by a perfectly conducting wedge is analyzed and solved exactly. The incident PB is modeled by the so called complex-source PB (CSPB). The authors derive an exact closed-form solution for the scattered field and demonstrate, via extensive numerical examples, the local scattering phenomena as a function of the PB parameters (direction, distance from the edge, spatial collimation, and pulse length): if the PB hits near the edge it generates a toroidal diffracted wavepacket that propagates along Keller's cone as well as transitional shadow boundaries effects. These diffraction phenomena diminish as the distance of the impinging wavepacket from the edge grows. >