【摘要】 垂直安装于有限接地平板上的单极对数周期天线阵（ＬＰＭＡ）在空间的辐射场方向图相对于基板上翘一定角度，这一实验结论有必要从理论上加以证实。利用一致性几何绕射理论（ＵＴＤ）分析了平板边缘的绕射特性，并结合几何光学场（ＧＯ），给出２～８ＧＨｚ的辐射特性图。从而为设计ＬＰＭＡ天线提供了理论基础。更多还原

【Abstract】 The radiation patterm of LPMA in space mounted on a limit size metal plate in ground connection sticks up in a certain angle related to the plate. The conclusion in experiment is necessary to be demonstrated in theory. The UTD is adopted to analyze the radiation characteristic at the edge of plate,and combining with the geometrical optics,pattern from 2 GHz to 8 GHz is given.It is useful for designing LPMA更多还原