涂敷导电圆柱曲面电振子共形天线辐射场UTD研究

涂敷导电圆柱曲面电振子共形天线辐射场UTD研究 A UTD SOLUTION FOR THE RADIATED FIELD FROM MONOPOLE ON A CONDUCTING CYLINDER SURFACE WITH A DIELECTRIC COATING 柯亨玉 Ke Hengyu 1 first-author 侯杰昌 Hou Jiechang 1 武汉大学电子信息学学院 武汉大学电子信息学学院 College of Electronic Information,Wuhan University, Wuhan 430072,China) \ \ College of Electronic Information,Wuhan University, Wuhan 430072,China) \ \ 研究了涂敷导电圆柱曲面电型共形天线高频电磁场特性及其计算方法．文中利用电大尺寸条件下的高频近似技术，导出了电振子激励源远区辐射场的一致性几何绕射理论（ＵｎｉｆｏｒｍＧｅｏｍｅｔｒｉｃａｌＴｈｅｏｒｙｏｆＤｉｆｒａｃｔｉｏｎ）（ＵＴＤ）公式．结果表明，涂敷导电曲面电型、磁型激励的辐射与绕射函数均为同一Ｆｏｃｋ型函数． A canonical problem is investigated for high frequency electromagnetic radiation from a monopole on a conducting cylinder with coating. At first, the exact solution of this problem is given in terms of Dyadic Greens function method. Then, using Watson transformation and high frequency asymptotic approximate technique to the exact soluton, a UTD soultion is obtained. The radiation field excited by a monopole is expressed in terms of the compound Focks functions （CFF）, which reduce to the geomertrical optics result in the deep lit region and the creeping waves in the shadow region. 涂敷导电圆柱曲面 电振子共形天线 高频近似理论 曲面绕射理论 Fock型函数 conducting cylinder with a dielectric coating monopole antenna high frequency approximate technique diffraction theory of convex surface compound Fock function TN011 国家自然科学基金(61672102) 1998-01-01 2021-04-01 1