摘要
飞行体对地观测形成的远近效应,在地球曲率的影响下,将其更加突出,从而使测控站跟踪中低轨道航天器的弧段和通信时间受到限制。为克服远近效应,可以采用星上赋形波束天线增加低仰角用户的接收电平,这种天线通常称为地球匹配波束天线。目前,实现地球匹配波束天线的方法很多,考虑到其经济实用性,本文采用双天线进行星上天线赋形,实现准地球匹配波束,并对有关参数进行了计算,给出了相应的仿真结果。
By the influence of direct propagation of high frequency electric wave and the globe curvature, the trajectory arc passage and communication time of small satellite should be limited. Satellite forming antenna beam is adopted to increase the receiving level of low elevation angel receiver, and to overcome the far and near effect. This kind of antenna is always called earth-matched beam antenna. Although there are many other methods to realize the forming antenna beam, the twin antennas are adopted by us because of its econmical practicability. In this paper, the correlation parameters are calculated and the simulation result is given out.
出处
《信息与电子工程》
2004年第4期302-305,共4页
information and electronic engineering
基金
重庆市博士点基金(20010611004)
关键词
通信技术
地球匹配波束
双天线
赋形
方向图
小卫星系统
communication technique
earth-matched beam
twin antennas
forming
directivity diagram
small satellite system
