天线阵与馈电网络不匹配对低副瓣天线性能的影响

The Effect of Mismatch Between the Array and the Feed Network on the Performances of a Low Sidelobe Array

本文利用网络理论分析了天线阵与馈电网络的相互作用,给出了分析计算公式,并以32元共轴振子线阵为例,计算了方向图变化的情形。由分析公式和计算结果可以看出,为了获得低副瓣方向图,必须严格控制功分器网络的精度及使天线阵与馈线有良好匹配。

The key factors in low sidelobc antennas are discussed. The interaction between the array and the feed network is analysed with network theory. Calculation formula are given. The pattern deformation of 32-dipoles co-axial array is calculated as an example. In order to get low sidelobe pattern, the power distribution among dipoles must be approximated to the theoretical value and the array must well match with a feed network.