Identifying the development in phase and amplitude of dipole and multipole radiation
Identifying the development in phase and amplitude of dipole and multipole radiation
复制标题
识别偶极子和多极辐射的相位和幅度的发展
DOI：
10.1088/0143-0807/33/2/345
复制
发表时间：
2012
影响因子：
0.7
通讯作者：
David L. Andrews
中科院分区：
文献类型：
--
作者：
E. M. Rice;D. S. Bradshaw;Kamel Saadi;David L. Andrews
平面波电磁辐射的空间相位变化和传播波前是人们普遍熟悉的教科书领域。相比之下，尽管偶极或多极源发射的辐射的发展幅度和相位得到的关注较少，但这些系统普遍存在。在这种情况下，由于迟滞，随着辐射从近场向波区向外传播，特征和特征显著地逐渐改变，这就更加复杂了。易于开发的电场分析表示，作为与源距离的函数，为辐射电磁发射最突出和最独特的特性提供了启发性的见解。结果的图形实现和动画对揭示突发性电磁场的空间形式和时间演变具有特别的指导意义。
The spatial variation in phase and the propagating wave-front of plane wave electromagnetic radiation are widely familiar text-book territory. In contrast, the developing amplitude and phase of radiation emitted by a dipole or multipole source generally receive less attention, despite the prevalence of these systems. There is additional complexity in such cases where, in consequence of retardation, the character and features significantly and progressively change as radiation propagates onwards, from the near-field and out towards the wave-zone. Readily developed analytical representations of the electric field, cast as a function of distance from the source, provide illuminating insights into the most prominent and distinctive properties of radiant electromagnetic emission. Graphical implementations and animations of the results prove particularly instructive in revealing the spatial form and temporal evolution of the emergent electromagnetic fields.
DOI：
10.1117/12.827983
发表时间：
2009
期刊：
--
影响因子：
--
作者：
Andrews D
通讯作者：
Andrews D