能量收发效率对共焦点反射式光通信组网天线系统性能的影响

发布时间：2018-06-26 05:43

本文选题：光通信 + 组网　；参考：《光学学报》2016年12期

【摘要】：激光通信组网天线系统能量发射效率与接收效率的高低决定了其通信能力的强弱。针对这一问题,提出了一种新型组网天线系统基本模型,分析其能量发射效率与接收效率的算法并进行数学建模,推导出了其能量发射效率与接收效率的计算公式,深入讨论了能量发射效率和能量接收效率与旋转抛物面上下开口直径、焦距以及会聚透镜单元口径、焦距等光学结构参数的准确函数关系,相关结论可应用于激光通信组网天线光学结构的设计与优化。最后以三颗低地球轨道(LEO)卫星在距离1000km范围内、以高于2.5Gb/s的速率进行组网通信为背景,通过分析和计算得出满足通信条件的激光器最小发射功率、组网天线系统的发射效率随跟踪通信角度的变化曲线以及接收效率。
[Abstract]:The energy transmitting efficiency and receiving efficiency of laser communication netted antenna system determine its communication ability. In order to solve this problem, a new basic model of netted antenna system is proposed. The algorithm of energy transmission efficiency and receiving efficiency is analyzed and the mathematical model is established. The formula for calculating energy transmission efficiency and receiving efficiency is derived. The relationship between energy emission efficiency and energy receiving efficiency and the optical structure parameters, such as the diameter of the upper and lower opening of the rotating parabola, the focal length, the aperture of the lens unit and the focal length, are discussed. The relevant conclusions can be applied to the design and optimization of the optical structure of laser communication netted antennas. Finally, with three Leo satellites in the range of 1000km, the minimum emission power of the laser satisfying the communication condition is obtained by analyzing and calculating the minimum emission power of the laser, which is connected with the network at a rate of more than 2.5 GB / s. The transmission efficiency of the netted antenna system varies with the tracking communication angle, as well as the receiving efficiency.
【作者单位】：长春理工大学空地激光通信技术国防重点学科实验室;长春理工大学光电测控与光信息传输技术教育部重点实验室;中国空间技术研究院通信卫星事业部;
【基金】：国家自然科学基金(91338116)
【分类号】：TN929.1

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