航天器工程2016，Vol.25Issue(6)：61-68,8.DOI:10.3969/j.issn.1673-8748.2016.06.010
Ka频段点波束天线指向精度对星地数传链路的影响分析
Analysis of Influence on Satellite-to-earth Date Transmission Link by Directing Precision of Ka-band Spot Beam Antenna
摘要
Abstract
To meet the LEO remote sensing satellites' demand for mass and high-rate data transmission to ground,the technology of Ka-band dual circular polarization frequency multiplexing has been gradually developed and utilized in engineering design.As an important part,the mechanical spot beam data transmission antenna of satellite should possess good performance in the directing precision and cross polarization discrimination (XPD).This paper discusses the performance of radiation gain and XPD of the antenna.According to the remote sensing satellite's engineering applications,the influences on the data transmission link caused by the polarization loss and the different directing errors of antenna are investigated.For the directing precision of antenna better than 1°,the link availability can reach 99.9％ when the ground station is locates in droughty area such as Kashi,but less than 99.0％ in pluvious area such as Beijing.These results can be utilized in the development of Ka-band spot beam antenna of LEO remote sensing satellites,and especially can provide the scientific references for the system design of the satellite-to-earth data transmission link and the mission planning.关键词
低轨遥感卫星/Ka频段点波束天线/指向精度/数传链路Key words
LEO remote sensing satellite/Ka-band spot beam antenna/directing precision/data transmission link分类
航空航天引用本文复制引用
鲁帆,郑小松,田志新,王中果,倪辰,曹京..Ka频段点波束天线指向精度对星地数传链路的影响分析[J].航天器工程,2016,25(6):61-68,8.基金项目
国家重大航天工程 （）
