计算电磁辐射场多极展开式的几种方法
Some alternatives for calculating multipole expansions of the electromagnetic radiation field
摘要:
本文讨论了电磁场的多极展开,重点讨论了辐射场。我们调查,如果就业Jefimenko的方程带来了一个新的见解的辐射场的计算。我们表明,如果发现一个有趣的例子,其中反转空间导数和积分之间的顺序是不允许的,肯定是有效的。此外,我们考虑了广义的多极扩展的功率辐射的一个封闭的系统的电荷和电流到一个更高的任意阶。
英文摘要:
We discuss the multipolar expansion of the electromagnetic field with an emphasis on the radiated field. We investigate if the employment of Jefimenko's equations brings a new insight into the calculation of the radiation field. We show that the affirmation is valid if one finds an interesting example in which inverting the order between spatial derivatives and integration is not allowed. Further, we consider the generalization of the multipolar expansion of the power radiated by a confined system of charges and currents to a higher arbitrary order.
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