介质覆盖导电圆柱上磁线源的辐射和绕射

介质覆盖导电圆柱上磁线源的辐射和绕射 RADIATION AND DIFFRACTION OF MAGNETIC LINE SOURCE ON THE SURFACE OF A CONDUCTING CY-LINDER WITH DIELECTRIC COATING 朱国强 Zhu Gouqiang Huang Xiwen 1 first-author 黄锡文 1 李永俊 1 方振民 1 航天工业部一院十四所 航天工业部一院十四所 Department of Space physics, Wuhan University Department of Space physics, Wuhan University 对于波长远小于物体尺寸的裸导体,几何绕射理论（GTD）是计算电磁波被这些物体绕射（包括在其上辐射）的有效的高频方法。当导体带有介质壳层,Nan Wang等曾有所研究。本文研究介质覆盖导电圆柱上天线的辐射的典型问题,为导出适合于有介质壳曲面导体上天线辐射的GTD公式提供基础。 The radiation and diffraction of an infinitely long magnetic line source on the surface of a conducting circular cylinder with dielectric coating were investigated. By making use of watson’s transformation, the eigerfunction was transformed into a contour integral. In the shadow the modes of creep-ing wave on outer surface were obtained by calculating residue series. For the illuminated region, geometrical optics rays that multiply reflect and refract within dielectrical 1.yer were given by the method of stationary phase. Num-nrical results of eigenfanction solution and high frequency approximation were good agreement on the both sides of the shadow boundary. 几何绕射理论 导电圆柱 爬行波 介质壳 教育部1985年重点科研项目资助 1988-03-01 2021-04-01 3