In recent years, optically controlled phased array radar has been widely used because of its high radiation power, flexible beam steering and anti-electromagnetic interference, but the radar system based on discrete devices is still plagued by the problems of large size, high power consumption and complex control method. In this paper, we propose a two-dimensional integrated optical true time delay network (OTTDN), which has the abilities of real-time monitoring and adjustment. The delay network is implemented with silicon-based adjustable optical delay chip. The chip contains four-channel delay lines with different steps to achieve more compact volume, which can realize 128 × 4 kinds of delay amount, but the size is only 5.7 × 15.8 mm² and the power consumption of all chip is 4.32 W. The results of delay chip measurement show that the maximum delay mean error is -0.55 ps, and the maximum root mean square error (RMSE) is 0.80 ps in four-channel. Based on these delay results, the pointing error of array antenna is less than 0.5° in the frequency of 3 GHz. If a power division structure is added to the RF front-end, this network can also be used in multi-beam systems, whose beams can be controlled independently at the same time.

近年来，光控相控阵雷达由于具有较高的辐射功率，灵活的波束控制和抗电磁干扰等优点而被广泛使用，但是基于分立器件的雷达系统仍然存在着体积大，功耗高的问题。和复杂的控制方法。在本文中，我们提出了一种具有实时监视和调整能力的二维集成光学实时延迟网络（OTTDN）。延迟网络由基于硅的可调光延迟芯片实现。该芯片包含四通道延迟线，具有不同的步长以实现更紧凑的体积，可以实现128×4种延迟量，但尺寸仅为5.7×15.8 mm ²所有芯片的功耗为4.32W。延迟芯片测量结果显示，四通道中最大延迟平均误差为-0.55 ps，最大均方根误差（RMSE）为0.80 ps。基于这些延迟结果，在3 GHz频率下，阵列天线的指向误差小于0.5°。如果将功率分配结构添加到RF前端，则该网络也可以用于多波束系统，该系统的波束可以同时独立控制。