摘要
为研究振子激励介质覆盖导电圆柱的辐射场,文中首先导出了介质层内并矢点源Iδ满足 Dirichlet 和 Neumann 边界条件的并矢格林函数;进而导出了介质层内电和磁振子辐射场的普适表达式。利用普适解讨论了应用上极为重要的导体表面开槽天线的辐射。将所得结果应用到特例与其他文献结果一致。
The dyadic Green's functions associated with a dielectric-coated conducting circular cylinder are investigated.Using the cylindrical vector wave functions, the eigenfunction expansion of the dyadic Green's functins for the cylinder are derived.Then,the general solution of radiation field excited by electric and magnetic dipoles in the dielectric layer of the cylinder is obtained by the dyadic Green's functins.As an application of the general solution,the results are presented for the electromagnetic field radiated by an aperture in the conducting surface coated with a dielectric layer in last section.Finally,some numerical results of the radiation field are persented.
出处
《武汉大学学报（自然科学版）》
CSCD
1990年第3期57-66,共10页
Journal of Wuhan University(Natural Science Edition)
关键词
电磁辐射
导电圆柱
开槽天线
drelectric-coated conducting cylinder
dyadic green's function
electromagnetic dipoles radiation
slot antenna
