中心博士生周德福的工作——Optical-pulse-based reconfigurable phase control for independent beamforming and band fusion in dual-band phased array receiver（用于双波段相控阵接收器的独立波束成形和波段融合的基于光脉冲的可重构相位控制）的相关成果近期被Optics Letters期刊接收发表，该工作得到了国家重点研发计划（2022YFB2803302）、国家自然科学基金（T2225023, 62205202）、上海市青年科技英才扬帆计划（No. 22YF1420200）的部分资助。
由于不同频段的电磁波能够实现不同的功能，多波段间的独立工作和波段融合使雷达系统能够在复杂的电磁环境中实现灵活探测。本文提出了一种基于光脉冲的可重构相位控制方法，使双频相控阵接收器能够以上述两种模式运行。该方法利用光脉冲和光延迟来补偿各频段的相位差。电子移相器用于补偿两个频段的相位残差。两个频段的所有相位操作都在一个链路中同时处理，从而保持了频段间的相位一致性。可重构相位控制方法的双波段独立波束成形能力和波段间相位相干性得到了实验证明，并取得了优异的性能。此外，构建的四通道双波段（X 波段和 Ku 波段）相控阵接收机实现了双波段融合，使测量距离分辨率提升了一倍，显示出该方法在提升雷达性能方面的潜力。
摘要: This letter proposes an optical-pulse-based reconfigurable phase control method, enabling a dual-band phased array receiver to operate in two modes: dual-band independent operation and dual band fusion. The method utilizes optical pulses and optical delay to compensate for phase differences across frequency bands. An electrical phase shifter is employed to compensate for phase residual in both bands. All phase operations to both bands are processed concurrently in one link, thereby maintaining inter-band phase coherence. Experimental results verify the ability of dual-band independent beamforming and inter-band phase coherence maintaining. A four-channel dual-band (X- and Ku-band) phased array antenna (PAA) receiver is constructed to measure PAA patterns and demonstrate band fusion. The pulse compression results in all directions reveal a doubled improvement in range resolution, which shows the potential for enhancement of radar performance.