摘要20世纪80年代以来，微纳卫星技术在通信、导航、对地观测、深空探测等领域发挥着重要作用。QB50项目是由欧盟第七框架出资，比利时冯卡门流体力学研究所牵头，全球50所高校和科研机构参与的一项纳卫星研制和发射计划，将在轨、多点、长时间探测地球低热层(90-300km)大气组成。南京理工大学积极参与QB50计划，将于2015年发射立方星NJUST-1，同时拟在校内建设VHF/UHF卫星地面站，用于实现卫星在轨后的遥测、遥控和数传管理。62946

本文研究大学VHF/UHF波段纳卫星固定式地面站的系统设计。首先，对VHF/UHF波段纳卫星通信系统与地面站间的通信链路进行了理论计算；然后，系统分析了VHF/UHF卫星地面站系统功能、工作原理及系统组成；通过广泛调研国内外常用VHF/UHF业余无线电通信设备，对地面站所包含的天线分系统、伺服控制分系统、信道分系统和软件分系统进行了设计与选型；最后，利用Ansoft HFSS三维电磁场软件对设计的六单元八木天线阵进行了系统性能的仿真分析，验证天线阵设计的合理性。

毕业论文关键词  立方体卫星 欧盟QB50项目 VHF/UHF卫星地面站 天线 伺服控制机构 收发信机 HFSS仿真

毕业设计说明书（论文）外文摘要

Title  System Design of the VHF/UHF Satellite Ground Station       

Abstract

Since the 1980s, micro-nano satellite technology play an important role in communications, navigation, earth observation, deep space exploration and other fields. QB50 project is funded by the European Union Seventh Framework, Belgium led von Karman Institute for Fluid Dynamics, the world's 50 universities and research institutions to participate in a nano-satellite development and launch programs in rails, multi-point, long probe Earth's lower thermosphere (90-300km) atmospheric composition. Nanjing University of Science and Technology(NUST) actively participates in the QB50 plan and will launch the CubeSat NJUST-1 in 2015, constracts the ground station in the school for the realization of satellites telemetry, remote control and data transmission management.

In this thesis, research is about the system design of the VHF/UHF band fixed-style satellite ground station of NUST.  First of all, calculating the communication links between the VHF/UHF band satellite communication system and the ground station. Then, making analysis of the system function, system composition and working principle of VHF/UHF satellite ground station system. Through extensive research both at home and abroad about VHF/UHF amateur radio communication device, antenna for ground station contains system, servo control system, channel system and software system are designed and selected of . Finally, using the 3D electromagnetic software Ansoft HFSS  for the analysis on the performance of six element Yagi antenna array design, and validating the reasonable of the antenna array design.

Keywords  CubeSat  The European project QB50 Link budget  Antenna VHF/UHF satellite ground station  Servo control mechanism  Transceiver  HFSS simulation

1 引言 1

1.1 课题研究的背景 1

1.1.1  立方体纳卫星 1

1.1.2  欧盟第七框架QB50项目 2

1.1.3  VHF/UHF卫星地面站 3

1.2 国内外VHF/UHF地面站研究现状 3

1.2.1 国外VHF/UHF地面站研究现状 3

1.2.2 国内VHF/UHF地面站研究现状 5

1.3 课题研究的目的与意义