【摘要】 针对小型、轻量化光通信终端，设计了一种大视场扫描捕获方案，并对该方案中所涉及的光学天线进行了详细研究。这种扫描捕获方案将MEMS反射镜作为伺服控制机构，进行天线指向控制；光学天线采用收发共口径体制，能够将MEMS反射镜的指向范围扩大3倍，且全视场畸变控制在了0.7%以内；最后对这种捕获方案的通信链路功率进行了核算，功率余量4.6 dB,较为充足。本文所提出的方案体小质轻，是无线激光通信领域中较为独特的形式，在无人机、单兵的应急建链、通信中具备良好的应用前景。更多还原

【Abstract】 In this paper, a large-field-of-view scanning scheme for small and lightweight laser communication terminals(LCTs)is designed, and the optical antenna involved in this scheme is also investigated.This capture scheme uses the MEMS reflector as a servo control mechanism, handling the pointing of antenna.The optical antenna adopts the signal receiving and transmitting common aperture system, which can expand the pointing range of the MEMS reflector by three times.Moreover, its aberration is less than 0.7 %.The accounting of the communication link using the scheme shows that the link power margin reaches 4.6 dB,which is more than adequate.The scheme proposed in this paper is small in size and light in mass, which is a unique form in the field of wireless optical communication, and it has good prospects for application in emergency communication of UAVs and man-portables.更多还原