微波光子雷达拥有分辨率高、处理速度快、同时多波段、多功能等优势,在航天系统中具有广阔的应用前景.为了满足航天应用对雷达系统体积、质量和功耗的严格要求,集成化已经成为微波光子雷达的重要发展方向.介绍了一款基于薄膜铌酸锂的微波光子雷达芯片,利用该芯片实现了雷达发射信号倍频产生和回波信号去斜接收,并对距离天线不同位置的目标进行了测距实验,得到的测量距离与实际距离基本相同,两者之间的误差小于4 mm.
Microwave Photonic Radar Chip Based on Thin-film Lithium Niobate
Microwave photonic radar has the advantages such as high resolution,rapid processing speed,multi-band capability,and multifunctionality,and has broad prospects in aerospace applications.In order to meet the stringent requirements of the size,weight,and power consumption of radar systems in aerospace applications,integration has become the main trend in the development of microwave photonic radar.In this paper,a microwave photonic radar chip fabricated on a thin-film lithium niobate platform is introduced.This chip facilitates the generation of frequency-multiplied radar signals and the de-chirped of received echo signals.Furthermore,the range-finding experiments involving targets positioned at varying distances from the antenna are carried out.The results show that the measured distances are consistent with the actual distances,and the error margins are less than 4 mm.
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