提出了三角形栅格布局的多单元径向线子阵的设计思想，根据该子阵馈电系统耦合量的需求，设计了一种新型耦合探针，并基于此探针，对中心频率为2.856 GHz的66单元三角形栅格径向线子阵的馈电系统进行了分析和设计。仿真计算结果证明：该66单元三角形栅格径向线子阵馈电系统在中心频率处基本实现了66路等幅馈电，在2.78~2.92 GHz的频带范围内，反射系数小于0.1。此外对加载单元天线的66单元阵列辐射特性进行了仿真计算，进一步验证了该馈电系统设计的可行性。

Multi-unit radial-line sub-array can be used to reduce cascade of array feed network, thus contributing to reducing the loss of the whole feed network, and triangle-grid arrangement can reduce the number of antenna units so as to reduce the cost effectively. Therefore, the design idea of multi-unit triangle-grid radial-line sub-array is proposed. Based on the required coupling amount of feed network, a new coupling probe is designed, and moreover a 66-element triangle-grid radial-line feed network at the center frequency of 2.856 GHz is designed. Simulation results show that, this feed network basically achieves an equal amplitude of 66 units’ coupling coefficient, and in the frequency band from 2.78 GHz to 2.92 GHz, the reflection coefficient is lower than 01. In addition, simulation on the radiation characteristics of the feed network which is loaded with the antenna units is carried out, which further verifies the feasibility of the design.