大型宽带相控阵天线多级子阵延时应用研究

Application of Multi-layer Subarray Design in Wideband Large Phased Array Antenna

在采用子阵延时方案的大型宽带相控阵天线系统设计中,子阵划分结构和实时延时器使用方式将直接决定系统的宽带性能、工程实现复杂度以及研制成本。本文基于阵列方向图合成的基础理论模型,推导得出多级子阵延时方案与传统单级子阵延时方案具有相近的阵列辐射性能。通过一维大型线阵多级子阵方案的应用示例,说明多级子阵延时方案可显著降低系统总体复杂度,在此基础上分析并总结阵列宽带性能与子阵规模和时延步进量之间的关系。

The subarray configuration and the real time delayer design have a direct influence on wideband large phased array antenna in realization, such as the performance, the complexity and the cost. Based on the theory model of pattern synthesis, it is demonstrated that the multi-layer subarray design has the similar radiation characteristics as the conventional single subarray design. The application of multi-layer subarray design in one dimensional phased array shows that it can sufficiently decrease the complexity of system. Furthermore, the affection of subarray size and time delayer step to wideband phased array is analyzed and concluded.