论文名称：A Domino Tiling Method for Circularly Polarized Sub-Arrayed Phased Array Antenna Based on Modified Maximum-Entropy Model。针对现有子阵相控阵拓扑优化中圆极化特性被忽视，从而导致圆极化子阵天线在扫描过程中轴比恶化的问题，本研究提出了一种圆极化子阵相控阵天线的多米诺排布方法。在该方法中，通过改进最大熵模型实现了具有约束排列规则的多米诺子阵约束排布。所得子阵拼接具有模块化交替水平和垂直布局，并且可以通过子阵级旋转馈电来改善阵列轴比。此外，该排布方法具有相对简单、易于实现的子阵馈电网络，同时通过凸优化算法对该子阵合成方向图进行优化，以实现高增益和低旁瓣水平。为验证该方法的有效性，设计了一个圆极化天线单元进行最优子阵排布设计。仿真和实验结果表明，该优化子阵排布得到阵列扫描轴比性能都很好。具体而言，在θ = 0°和θ = 45°时，该子阵圆极化阵列在中心频率处的轴比均低于1.2 dB。此外，该排布方法在圆极化子阵列相控阵中还展现出宽带圆极化特性。工作主要完成人：林宏声，程钰间。

论文链接：https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10319360&tag=1

Abstract—In the majority of current research on phased array subarrayed tiling, the circular polarization characteristics of the array are often neglected, which results in a deterioration of the axial ratio (AR) of a circularly polarized subarrayed antenna during scanning. This article presents a domino tiling method for the circularly polarized subarrayed phased array antenna (PAA). In the proposed method, domino subarray tiling with constrained arrangement rules is achieved by a modified maximum-entropy model. The resulting subarray tiling exhibits a modular alternating horizontal and vertical layout, where the subarrayed sequential rotation feeding can be introduced to improve the AR. Moreover, it has a relatively simple subarrayed feeding network, which is easy to implement. The array pattern synthesis for the proposed design, achieving high directivity and low sidelobe levels (SLLs), is performed by convex optimization. To validate the effectiveness of the proposed method, a circularly polarized element is designed to configure the validating subarrayed antenna. Both simulated and experimental results of the validating subarrayed antenna

 show good AR performance, regardless of the boresight direction or scanning angles. Specifically, the AR s of the validating subarrayed antenna for θ = 0◦ and θ = 45◦ are both below 1.2 dB at the center frequency. Additionally, the proposed method exhibits potential for wideband operation in circularly polarized subarrayed phased arrays.

Index Terms—Circularly polarized, circularly polarized subarrayed phased array, integer programming, maximum-entropy model, scanning axial ratio (AR), subarrayed sequential rotation,

subarrayed tiling.