摘要
基于电磁场的方向多长度标准理论,研究了无限大均匀各向异性介质中电磁源的辐射特性。首先提出了电各向异性介质中矢量磁位和标量电位的洛伦兹规范,利用方向多尺度理论,得到了该介质中时谐标量势φ的达朗伯方程,进一步得到了推迟形式的标量势φ和矢量势A的解析表达式,验证了该表达式正确性;在此基础上,得到了电各向异性介质中点电荷的表达式并对其结果做了仿真与分析;得到了电各向异性介质中的辐射电磁场;最后,给出了如何利用电磁场的方向多长度标准理论获得磁各向异性介质中和电磁各向异性介质中推迟势的具体方法。所得结果为各向异性介质如磁化等离子体、降雨等介质中雷达、天线的工程优化设计提供了理论基础。
This paper focused on radiation fields of electromagnetic sources in a boundless homogeneous medium with electric anisotropy of electromagnetic properties.For the first time the Lorentz gauge of anisotropic media was proposed.By using the scales theory of EM waves,the non-homogeneous differential equation of scalar potential was obtained and an explicit exact representations of φ and A were developed respectively with their validity demonstrated.On this basis,the effects of dyadic elements on electric potential of a point charge are simulated and the radiation electromagnetic field was then presented analytically.Finally was a concrete methodology of how to acquire the explicit exact representations of φ and A of the material with electromagnetic anisotropy of property.It would be easy and interesting to extend the obtained results to other fields such as optimization of antenna design in material with anisotropy of electromagnetic characteristics.
作者
李瑾
LI Jin(Information Engineering College,Shaanxi Xueqian Normal University,Xi'an 710100,Shaanxi,China;School of Electronics and Information,Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China)
出处
《咸阳师范学院学报》
2019年第2期59-63,共5页
Journal of Xianyang Normal University
基金
陕西省科技厅自然科学基础研究计划项目(2018JQ6094)
陕西学前师范学院科研基金项目(2015ZD?KJ009)。
关键词
电磁辐射
介质
多尺度法
electromagnetic radiation
media
scales method
