Optimum Spatial Arrangement of Array Elements for Suppression of Grating-Lobes of Radar Cross Section
Optimum Spatial Arrangement of Array Elements for Suppression of Grating-Lobes of Radar Cross Section
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DOI：
10.1109/lawp.2010.2044230
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发表时间：
2010-02
影响因子：
4.2
通讯作者：
B. Lu;S. Gong;Shuai Zhang;Y. Guan;J. Ling
中科院分区：
文献类型：
--
作者：
B. Lu;S. Gong;Shuai Zhang;Y. Guan;J. Ling
提出了一种优化阵列天线雷达散射截面的新方法。以前的一项工作已经报告了阵列的RCS是阵列RCS因子乘以元素RCS因子的乘积。在这种方法中，通过优化阵列的RCS因子，可以在某些方向上显著地减小来自等间距阵列的强散射。利用该方法，优化后的阵列将以低得多的水平对指定的入射方向进行散射。为了说明该方法的有效性，用该方法对平面偶极子阵列和具有蝴蝶结天线单元的线阵进行了优化设计。数值计算和仿真结果表明，等间距阵列的RCS方向图在某些方向上一般都有一些栅瓣。因此，提出的方法被用来抑制这些光栅瓣，从而设计出低RCS阵列。算法优化和仿真结果验证了所提出的方法能够有效抑制这些光栅瓣。
A new method to optimize the radar cross section (RCS) for array antennas is presented. A previous work has reported that the RCS of an array is the product of the array RCS factor multiplying the element RCS factor. In this method, the strong scattering from an equally spaced array can be considerably reduced at some certain directions by optimizing the array RCS factor. With the proposed method, the optimized array will scatter waves at a much lower level against prescribed incident directions. In order to illustrate the validation of the proposed method, a planar dipole array and a linear array with bowtie antenna elements are designed and optimized by the proposed method. The numerical and simulated results show that the RCS pattern of equally spaced array generally has some grating-lobes at some certain directions. Hence, the proposed method is applied to suppress these grating-lobes to design a low RCS array. The algorithmically optimized and simulated results validate that the proposed method can help to suppress these grating-lobes.