%0 Journal Article
%T Study on the transmitting mechanism of CSELF waves: response of the alternating current point source in the uniform space<br>关于人工源极低频电磁波发射源的讨论——均匀空间交流点电流源的解
%A CHEN Xiao-Bin
%A ZHAO Guo-Ze
%A <br>陈小斌
%A 赵国泽
%J 地球物理学报
%D 2009
%I 
%X In Control Source of Extremely Low Frequency (CSELF) method, an antenna is composed of very long grounding electrical line which is distributed along high resistivity route. Strong currents usually more than one hundred Amps are injected into the earth through the grounding ends, of which the flow and distribution characteristics are still not very clear yet. A new idea is put forward in this paper. The antenna is separated into two parts. One part is a long electrical line source with alternating current (AC). The other is an AC point source. The total field can be obtained by the vector sum of the responses excited by both sources. Here the solution of problem of AC point source in a uniform space is discussed in detail. The responses excited by an AC point source and a DC point source are compared carefully. The results show that there is little difference between an AC point source and a DC point source in the uniform space within a small scale region (the distance of site to source is about tens or hundreds meters). An AC point source can be approximated by a DC point source; but in a large region, the attenuation of the field excited by an AC point source is much faster than that of a DC point source. Because the antenna of CSELF is rather long, where the distance of site to source is very large in general, thus the distribution of current in the earth satisfies the AC law, and could not be approximated by a DC point source.
%K CSELF
%K Alternating point source
%K Uniform space
%K Current distribution<br>CSELF
%K 交流点电流源
%K 均匀空间
%K 电流分布
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=7437EA805783D2ECDA74E725784A8ED5&yid=DE12191FBD62783C&vid=286FB2D22CF8D013&iid=5D311CA918CA9A03&sid=835C863860D9932E&eid=83988AB6331F63A8&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=3&reference_num=25