硅基片上集成二维光控多波束形成的研究

传统雷达系统在当今日益复杂的电磁环境中面临严重挑战，而集成微波光子学技术可突破传统雷达的技术瓶颈，具有大带宽、高分辨率、高复用度、高集成化等技术优势。本文基于集成微波光子技术，研制了一款硅基集成二维光控多波束形成系统样机，提出了一种基于二氧化硅平面光波导的片上集成二维光控多波束形成系统架构，结合流片加工平台完成了关键光芯片的设计流片和封装测试，最终完成系统样机整机联调测试，并对实验结果进行理论计算处理，验证了硅基集成波束形成系统的关键性能指标。系统具有大瞬时带宽、二维同时多波束、各波束多波位独立扫描的能力，与此同时兼具硅基光子集成技术的小型化、轻量化、低成本等优势，试验结果验证了集成微波光子技术应用于雷达系统的先进性和应用潜力。

Research on Silicon-Based On-Chip Integration of Two-Dimensional Multi-Beam Optically Controlled Beamformer

In increasingly complicated electromagnetic environment nowadays, the traditional radar system is facing severe challenges. The technical advantages of large bandwidth, high resolution, optical multiplexing, and high integration the integrated microwave photonics could break the bottleneck of the traditional electronic technologies. In this paper, the on-chip integration of two-dimensional optically controlled multi-beam beamformer architecture based on silica planar optical waveguide is proposed. With the help of the fab factory, we accomplished the design, tape out, test, and packaging of key optical chips, and then we thoroughly tested the whole system. The experimental results are theoretically calculated and processed to verify the key performance indexes of the system. The system features the capabilities of large instantaneous bandwidth and two-dimensional steering of multiple beams independently and simultaneously. Meanwhile, this system has the advantages of miniaturization, lightweight, and low cost of the silicon-based photonic integration technology. The experimental results verify the advantage and application potential of the integrated microwave photonic technology in the radar system.