介质覆盖导电圆柱振子的辐射场

介质覆盖导电圆柱振子的辐射场 ELECTROMAGNETIC RADIATION FROM DIPOLES IN THE DIELECTIC LAYER OF A DIELECTRICCOATED CONDUCTING CIRCULAR GYLINDER 柯亨玉 Ke Hengyu Huang Siwen Li Yongjun 1 first-author 黄锡文 1 李永俊 1 武汉大学空间物理系 武汉大学空间物理系 Deptment of Space Physics Wuhan University Deptment of Space Physics Wuhan University 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. 介质覆盖导电圆柱 并矢格林函数 电磁振子辐射 开槽天线 drelectric-coated conducting cylinder dyadic Green’s function electromagnetic dipoles radiation slot antenna 1990-03-01 2021-04-01 3