GEO轨道兆瓦级空间太阳能电站接收整流技术研究

依据中国空间太阳能电站建设中远期规划和技术发展水平，预估兆瓦级电站发射天线口径为200 m左右，并根据收发天线口径尺寸的约束关系以与接收天线口径相关的波束收集效率和构建成本之间的矛盾为问题导向，通过研究不同口径的接收天线口面上功率密度分布，分析与之匹配的后端整流电路需求，给出了接收天线口径的优选过程。研究结果表明5 km为较合理的兆瓦级电站接收天线设计建设指标，且在整个接收整流阵列中仅需同一种整流器件，同样整流电路即可实现较高的整流效率，为实现兆瓦级空间太阳能电站（Space solar power satellite，SSPS）的演示验证系统论证提供了技术支撑。最后以此为基础研究了整流电路的设计实现，给出了适用于较低输入功率密度下提高整流效率的技术途径。

Receiving Array and Rectifier for MW-Level SSPS in GEO Orbit

Based on the medium and remote planning on space solar power satellite (SSPS) and technological development level in China, the transmitting antenna aperture is estimated to be about 200 m in the future. According to the constrains of transmitting and receiving antenna aperture, with respect to contradiction between beam collection efficiency and construction cost that are both associated with receiving antenna aperture, a receiving antenna aperture optimization process is given by studying power density distribution in receiving antenna with different sizes and analyzing the corresponding back end rectifying circuit requirements. Research results show that the reasonable size of receiving antenna in MW-level SSPS system is 5 km, while only type of diode and the same rectifier are adopted in the whole antenna area. This parameter supplies technical support for the realization of MW-level SSPS demonstration and verification system. On the basis of this, the implementation of rectification circuit is studied. Finally, feasible techniques for MW-level SSPS of lower power density are proposed.