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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。
Laser communication networking Antenna system energy transmission efficiency and the level of reception efficiency determines the strength of its communication capabilities. To solve this problem, this paper proposes a new basic model of networked antenna system, analyzes the algorithm of its energy transmission efficiency and receiving efficiency, and mathematically models it. The formula for calculating its energy transmission efficiency and reception efficiency is deduced. The energy emission efficiency and energy receiving efficiency are related to the exact function of the optical structure parameters such as the diameter of the upper and lower openings of the paraboloid of revolution, the aperture of the convergent lens unit, the focal length and the like. The relevant conclusions can be applied to the design and optimization of the optical structure of the antenna of the laser communication network. Finally, three LEO satellites in the distance of 1000km, with a higher than 2.5Gb / s rate of network communication as the background, by analyzing and calculating the minimum transmit power to meet the communication conditions of the laser, networking Transmitting efficiency of the antenna system varies with the tracking communication angle and the receiving efficiency.