Time-domain near-field analysis of short-pulse antennas .I. Spherical wave (multipole) expansion
Time-domain near-field analysis of short-pulse antennas .I. Spherical wave (multipole) expansion
复制标题
短脉冲天线的时域近场分析.I．
DOI：
--
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
E. Heyman
中科院分区：
文献类型：
--
作者：
A. Shlivinski;E. Heyman
利用时域球面波（多极）展开法分析了自由空间中时变源分布的辐射。多极矩函数计算的时间相关的源分布。在近区和远区的级数收敛率和近区反应场的界限被确定为源支持和脉冲长度的函数。该配方涉及一个球形传输线表示，可以扩展到更一般的球形配置。该公式还描述了在物理上透明的方式，将被用于在配套文件中定义和探索的基本概念，如TD无功能量和Q，并得出天线性能的界限的字段和能量传输机制。最后，上述讨论的概念，证明了数值脉冲辐射的圆形电流盘。
The radiation from a time-dependent source distribution in free-space is analyzed using time-domain (TD) spherical wave (multipole) expansion. The multipole moment functions are calculated from the time-dependent source distribution. The series convergence rate in the near and far zone and the bounds on the near-zone reactive field are determined as functions of the source support and of the pulse length. The formulation involves a spherical transmission line representation that can be extended to more general spherical configurations. This formulation also describes the field and energy transmission mechanisms in a physically transparent fashion that will be used in a companion paper to define and explore fundamental concepts such as TD reactive energy and Q and to derive bounds on the antenna properties. Finally, the concepts discussed above are demonstrated numerically for pulsed radiation by a circular current disk.