离轴天线在卫星激光通信系统中的应用  

Off-axis optical telescope for satellite laser communication terminal

作　　者：俞建杰[1,2] 李宣娇[1] 谭立英[1] 马晶[1] 韩琦琦[1] 

机构地区：[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学仪器科学与技术博士后流动站,黑龙江哈尔滨150001

出　　处：《红外与激光工程》2013年第7期1890-1895,共6页Infrared and Laser Engineering

基　　金：国家自然科学基金(10904026);黑龙江省博士后基金(LBH-Z10140)

摘　　要：现有卫星激光通信终端通常采用同轴两反天线结构,该结构存在接收视场小、发射效率低等缺点。为消除同轴两反结构存在的固有缺陷,提高卫星激光通信系统的瞄准和捕获效率,研究了利用离轴三反结构提高卫星激光通信系统的性能。首先根据基本像差理论,推导得到离轴三反光学结构的初始结构方程。利用离轴结构具有更多设计参量的优势,对离轴三反结构进行优化设计,给出了设计实例。计算机仿真得到的光学传递函数、点列图、衍射包围圆能量和波前误差等均表明:离轴三反结构与同轴两反结构相比,具有更加优异的性能,能够满足卫星激光通信系统不断提升的性能要求。The coaxial two-mirror reflective telescope was usually used within a typical satellite lasercommunication terminal, which has the disadvantage of small field of view and low emission efficiency.order to eliminate the inherent defects of the existing coaxial two-mirror reflective telescope, andimprove the pointing and tracking efficiency of the satellite laser communication system, off-axis three-reflective optical telescope was designed for satellite laser communication terminal. The initial structure ofthe off-axis telescope was deduced according to the basic aberration theory, and the off-axis three-mirrorreflective telescope with more lager field of view and higher efficiency was given. Simulation results ofmodulate transfer function, spot diagram, diffraction encircled energy and wavefront error all show thatthe off-axis three mirror reflective structure has the better performance compared with the coaxial two-mirror reflective structure, and meets the increasing design requirements of satellite laser communicationsystem.

关 键 词：卫星激光通信 离轴天线 离轴三反天线 同轴两反天线 

分 类 号：TN929.1[电子电信—通信与信息系统]