面向卫星通信系统的低成本超表面相控阵技术

低轨通信卫星系统因其传输延迟小、通信容量大、发射运营成本低等优势，受到了国内外的广泛关注。然而，低轨通信卫星技术的发展对星载天线系统提出了挑战。为提高卫星星座的通信容量以及实现对用户的跟踪覆盖，波束扫描、波束可重构及多波束覆盖不可或缺。在低成本建设运营的背景下，迫切地需要一种低成本的天线系统方案。作为一种低成本新型相控阵技术，综述了超表面相控阵天线技术及其在波束调控中的应用。首先对超表面天线波束形成的方法进行了简单的研究，之后介绍了超表面电磁调控的机理以及实现可重构的手段，最后介绍了超表面相控阵天线在波束形成、波束扫描、多波束产生中的应用。该技术相较于传统相控阵技术，大幅降低了成本，且在电磁波极化、频率调控中展现出巨大的灵活性。通过对该技术的综述，展望了超表面相控阵在低轨通信卫星中的应用。

Low-cost metasurface phased array technique for satellite communication system

Low earth orbit (LEO) communication satellite system has received extensive attention because of its advantages of small transmission delay, large communication capacity and low launch operation cost. However, the development of LEO communication satellite technology poses challenges to the satellite antenna system. In order to improve the communication capacity of satellite constellation and realize the tracking coverage for users, beam scanning, beam reconfiguration and multibeam coverage are crucial. Under the background of low cost construction and operation, there is an urgent need for a low cost antenna system scheme. As an alternative low cost phased array technology, metasurface phased array technology and its application in beam modulation are introduced. Firstly, metasurface antenna based beamforming methods are briefly studied, then the electromagnetic manipulation and reconfiguration through metasurface are introduced. Finally, the applications of metasurface phased array in beamforming, beam scanning and multibeam generation are introduced. Compared with the traditional phased array technique, this greatly reduces the cost, and shows flexibility in electromagnetic wave polarization and frequency control. In this paper, the application of metasurface phases array in LEO communication satellite is also prospected.