目马卡天线离轴发射仿真与实现_毕业设计论文.doc

毕业设计(论文)
题目马卡天线离轴发射仿真与实现
专业通信工程
马卡天线离轴发射仿真与实现

摘要
在空间激光通信系统中,光学天线是一个物镜系统,通过折射、反射和折射-反射光学系统实现,目前应用比较广泛的是牛顿系统、卡塞格林系统。卡塞格林天线系统因副镜遮挡造成光能量浪费,本论文就是针对此问题进行了研究,研究的内容如下:
(1)简单介绍了无线激光通信系统,对光学天线的应用和发展动态进行了简要介绍,并讨论了卡塞格林天线系统的优缺点。
(2)分析卡塞格林天线的镜面参数,说明马卡望远镜的基本设计原理。阐述各种常见的望远镜系统的发展史、结构、功能等。
(3)介绍ZEMAX软件的基本参数应用和参数设置,利用ZEMAX软件在序列模式下仿真出卡塞格林系统,分析说明马卡望远镜的各参数的具体意义。
(4)对马卡天线系统离轴发射建模,分析激光器位置参数的变化对光斑的影响,找出激光器最佳安放位置,得出激光器发射功率。将发射功率与功率测试实验相结合,判断出轴偏离程度,再调整系统,进一步提高光功率。
关键词:激光通信,卡塞格林,天线,离轴,望远镜

Abstract
Newton system and Cassegrain system are monly in optical antenna systems as field lens which include refraction system,inflection system and refraction-and-inflection ,the potential problem of sheltering ratio in Cassegrain system leads to a loss of effective power of the optical system ,This paper is to solve this problem , the contents of the research are as follows:
(1) Briefly Introduced the wireless munication system, application and development of optical antenna is introduced briefly, and discussed the advantages and disadvantages of the Cassegrain antenna system.
(2) Analyze the mirror parameter of Cassegrain antenna, illustrated the basic principle of design of Cassegrain telescope, the development history 、variety、structure mon telescope system .
(3) Introduce the basic parameters and parameter setting of ZEMAX software, simulated the Cassegrain system in the sequence mode with ZEMAX software, explain each parameter of the Cassegrain telescope.
(4) The off-axis emission of Marca antenna system is modeled. Analyze the effect of laser parameters on the change of position of the laser spot, find the best position, get the laser transmitting power. The transmit power and power test bined, the axis deviation degree, and then adjust the system, further improve the optical power.
Keywords: munication,Cassegrain,antenna,off-axis,telescope
目录
目录 1
第1章绪论 2
无线激光通信 2
光学系统概述 4
国内外光学天线的发展动态 5
卡塞格林天线优缺点 7
论文的目的及研究方法 9
第2章望远镜的设计及