%0 Journal Article
%T ELECTROMAGNETIC ENERGY FLOW PATTERN ON THE AXIS OF A CIRCULAR DISK BY TRANSIENT EXCITATION<br>瞬态激励下圆盘轴向电磁能量的流动规律
%A Zhu Xianyang
%A Wang Wenbing
%A Ren Lang
%A <br>朱贤阳
%A 汪文秉
%A 任朗
%J 电子与信息学报
%D 1994
%I 
%X The exact energy flow pattern on the axis of a circular disk by transient excitation is presented. It is shown that non-decaying region does not appear when the source is chosen to be a rectangular pulse, on the contrary, there exists a uprising region on the axis when the width of the pulse is less than a/c. After reaching its maximum value, the energy decays slowly until the law of r-2 is met. The scale of the uprising region is dependent upon the size of the antenna and the width of the pulse. The energy flow line tube excited by a harmonic wave is also given. It is also shown that there is a oscillatory region near the source, the amplitude is also uprising, which is quite different compared with the conclusion drawn by S. Silver (1949). Finally, the phenomenon of energy uprising in time domain is explained and some problems about the electromagnetic missiles are also expounded.
%K Electromagnetic energy
%K Circular disk
%K Near field
%K Fresnel region
%K Electromagnetic missiles<br>电磁能量
%K 圆盘
%K 近区场
%K Fresnel区
%K 电磁导弹
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=C91B39EA15B60FEAF6C4728F17E117AF&yid=3EBE383EEA0A6494&vid=7801E6FC5AE9020C&iid=38B194292C032A66&sid=5B5B75F4854B8331&eid=4B1FFFA116F7AE3B&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=12