两层介质中运动水平时谐偶极子产生的电磁场.pdfVIP

30 5 Vol. 30 No. 5 2 0 0 9 5 A CTA ARMA MENTARII May 2009 两层介质中运动水平时谐偶极子产生的电磁场 毛伟, 林春生 ( , 430033) : 为了使舰船轴频电磁( EM) 场能被真正应用于新型水雷武器引信, 求解出了在两层 质 中运动的水平时谐偶极子在固定场点产生的电磁场求解过程分为两步: 首先求解静止时谐偶极 子在 质中的固定场点产生的电磁场; 然后通过狭义相对论的洛仑兹变换, 得到匀速运动的时谐偶 极子在固定场点产生的电磁场; 最后以深海中低速运动的极低频水平时谐偶极子为例, 对其产生的 电磁场进行了数值计算, 并且通过与试验数据的对比证明了本文的实用性和正确性 : 无线电物理; 水平时谐偶极子; 麦克斯韦方程; 洛伦兹变换; 电磁场 : TM 153 : A : 2009) The EM Fields Produced by a Moving HorizontallyDirected TimeHarmonic Dipole in Twolayer Media MAO Wei, LIN Chunsheng ( Na el Uni ersity of Engineering, Wuhan 430033, Hubei, China) Abstract : In order to really apply the shaftrate electromagnetic( EM) fields to new type mine fuze, the EM fields at a fixed field point produced by a mo ing horizontallydirected timeharmonic dipole, locat ed in the tw olayer media w ere deri ed. The w hole process w as di ided into two steps, in the first place, the EM fields at a fix ed field point produced by a static dipole were deri ed; then based on the basic principle of the special theory of relati ity and Lorentz transformation, the EM field produced by the mo ing dipole were deri ed; in the end, taking a ELF dipole mo ing slow ly in the deep ocean for example, the numerical calculations of its EM fields w ere carried out. The practicality and correctness of the results w ere pro ed through contrasting the results w ith the experimented data. Key words: radio physics; horizontallydirected timeharmonic dipole; M axw ell equation; Lorentz transformation; electromagnetic fields , 0 , [ 1- 2] ,