面向空间太阳能电站应用的超大规模天线阵列模块尺寸与姿态偏差效应分析  

Effect analysis of module size and attitude of very large antenna array in space solar power station applications

作　　者：朱博文 王薪 刘冰[1] 曹嘉琳 江羿 侯欣宾[3] 董士伟[4] 陆明宇 ZHU Bowen;WANG Xin;LIU Bing;CAO Jialin;JIANG Yi;HOU Xinbin;DONG Shiwei;LU Mingyu(College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;School of Electrical Engineering,Chongqing University,Chongqing 400044,China;Qian Xuesen Laboratory of Space Technology,China Academy of Space Technology,Beijing 100094,China;China Academy of Space Technology(Xi’an),Xi’an 710000,China;West Virginia University Institute of Technology,Beckley,West Virginia 25801,USA)

机构地区：[1]南京航空航天大学电子信息工程学院,南京211106 [2]重庆大学电气工程学院,重庆400044 [3]中国空间技术研究院钱学森空间技术实验室,北京100094 [4]中国空间技术研究院西安分院,西安710000 [5]西佛吉尼亚大学电气与计算机工程系,美国西佛吉尼亚州25801

出　　处：《空间电子技术》2023年第3期13-18,共6页Space Electronic Technology

基　　金：民用航天技术预先研究项目(编号:D010103);国家自然科学基金(编号:61871220)。

摘　　要：空间太阳能电站微波能量传输需要具备超大规模的相控阵列波束形成和超高精度的波束指向控制能力。采用大尺寸的基本相控电单元能够缩减天线阵列规模和微波发射通道数目,从而显著降低微波能量发射系统的构造和组装成本。然而,相控单元的尺寸越大,对天线模块的结构刚性和姿态控制精度要求越高。基于天线阵列的结构化构型设计,提出超大规模回复反射阵列的结构模块和相控电单元的尺寸分析模型,推导得到结构模块姿态偏差、电单元尺寸要求和能量传输效率的近似关系及其解析表达式,可供作为空间太阳能电站微波传能天线阵列及其波束控制方案设计的参考依据。In space solar power applications,solar power on the order of gigawatt is harvested by satellites over the earth’s geostationary orbit and then transmitted to the earth wirelessly via a narrow microwave beam.A large antenna array with an aperture size on the order of 1 kilometer is required to construct the narrow microwave beam aiming at a designated ground station on the earth precisely.The design and practical implementation of such a large antenna array in outer space involve unprecedented engineering problems.For instance,the antenna array must be assembled in outer space using modules fabricated on the earth.In this paper,an analytical model is formulated to estimate the power transmission efficiency of the large antenna array for space solar power applications.The impact of various practical parameters on the power transmission efficiency could be visualized readily from the analytical model.As one example,each module’s physical attitude may deviate from the ideal status during the assembly,and the relationship between the modules’physical status and power transmission efficiency is characterized analytically in this paper.Based on the analytical model of this paper,systematic research efforts are being conducted on the antenna array for space solar power applications.

关 键 词：微波能量传输 无线能量传输 空间太阳能电站 天线模块姿态 回复反射天线阵列 

分 类 号：TN015[电子电信—物理电子学] V443[航空宇航科学与技术—飞行器设计]