平面相控阵天线最佳阵面倾角和最大单元间距的确定

Optimal Array Face Tilt and Maximum Element Spacing for Planar Phased Array Antennas

单元间距是相控阵天线设计的一个基本参数，合理选择单元间距可以防止栅瓣进入实空间。另外，选择最佳阵面倾角，可以使不出现栅瓣的单元间距选择到最大。最佳阵面倾角的设计方法有两种：第一种是使阵列波束的最大扫描角最小；第二种是使阵列可选择的单元间距选择得最大，从而使覆盖整个阵列的单元数最少。本文在单元矩形栅格排列和三角形栅格排列的条件下，研究了平面相控阵列的最佳阵面倾角和可选择的最大单元间距，编制了通用计算软件，这对实际工程设计具有实用价值。

The technique for determining the optimal array face tilt and maximum element spacing is presented. The selection of element spacing is important for planar phased array antenna. The optimal array face tilt maximizes the element spacing and avoids the grating lobe scaning into the real space. There are two methods to determine the optimal array face tilt, either to minimize the maximum off-axis scan angle or to minimize the total number of array elements. The software considing the rectangular and triangular grid array is produced. The technique is useful and practical.