摘要
平面相控阵天线不可避免地存在阵元失效的情况,因而可能会破坏雷达等系统严格要求的低副瓣特性。实际中失效阵元往往不能及时更换而装备仍要继续工作,需要对阵元失效的危害程度进行有效评估,判断方向图校正是否可行。各种文献对线阵和矩形布阵的阵元失效分析较多,而对常见的三角布阵分析不多,因此对三角布阵的阵元失效分析具有重要的现实意义。u-v坐标系下三角布阵阵元排布相对稀疏的一维在与阵面平行的方向存在副瓣抬高,在分析了此现象的基础上,仿真了Taylor加权矩形与三角布阵不同位置的阵元失效对最大副瓣电平的影响,对两者作出了对比,得出了位于中心位置的阵元失效对低副瓣特性影响最大以及阵面失效率在3%以内可保持-20dB的副瓣电平的结论,为阵元失效修复提供了一定依据。
Planar phased array antennas inevitably have array element failure so it may damage the low sidelobe feature which radar and other systems have strict requirements on.In practice,failed array elements offen cannot be replaced in time and the equipment still has to continue to work,and it is necessary to evaluate the hazard degree of the element failure and determine wheth⁃er the pattern correction is feasible.There are many failure anlyses of linear arrays and rectangular-grid planar array in various docu⁃ments but not many anlyses of triangle-grid planar array,so research of the triangle-grid planar array is important.There is a side⁃lobe deterioration phenomenon of the ralatively spare dimension at the parallel direction to plane of triangle-grid planar array,which is in the u-v coordinate system.Based on this analysis,the sidelobe effect of the failure of the array element at different positions in the Taylor weighted rectangular-grid and triangle-grid planar phased array are simulated in this paper.And comparing the two,it is known that the failure of the centrally located array element has the greatest impact on the low sidelobe features and-20dB sidelobe level can be maitained of less that 3%elements failure,which is aimed to antenna pattern repair.
作者
万康
WAN Kang(No.38 Research Institute of China Electronics Technology Group Corporation,Hefei 230088)
出处
《舰船电子工程》
2022年第1期67-72,共6页
Ship Electronic Engineering
关键词
矩形布阵
三角布阵
阵元失效影响
副瓣电平
方向图校正
rectangular grid planar array
trianglar grid planar array
effects of element failure
side-lobe level
antenna pat⁃tern repair
