为了实现大波束指向范围和精细步进调节的光波束形成网络,采用了基于光学色散实现光真延时的方法.通过光开关实现N路高色散光纤路径切换获得大步进等延时差,实现了波束指向的大范围和大步进调节;通过调谐线性啁啾光纤光栅色散系数连续调谐获得小步进等延时差,实现了波束指向的小范围和小步进调节.结果表明,波束指向角度范围为-73.74°～+73.74°,切换步进为0.458°,基于光学色散原理可以实现光波束形成网络的大波束指向范围和精细步进调节.这一结果对优化相控阵天线系统设计是有帮助的.

简要回顾了光控相控阵天线的发展历程,介绍了光控相控阵天线的工作原理,探讨了光控相控阵天线在卫星载荷领域的应用优势.指出高通量卫星超宽带应用和多功能载荷多频段应用是卫星通信的发展趋势之一,光控相控阵天线在大口径、超宽带、宽角扫描方面的应用优势明显.

光电振荡器被广泛应用于雷达、通信和测量领域,是微波光子学领域的研究热点,新概念和新技术的引入促进了光电振荡器研究的发展,进一步拓展了光电振荡器在现代电子系统中的应用.介绍了引入光电振荡器中的新概念和新技术,包括宇称-时间对称光电振荡器、傅里叶域锁模光电振荡器、参量振荡光电振荡器和集成光电振荡器,指出了光电振荡器的未来发展方向.

文章针对载波相位测量在高精度测量、定位领域中,由于导航信号接收天线与发射天线的非理性因素导致的测量误差问题进行研究.根据载波相位测量原理及导航信号天线的收、发原理,从理论上分析了因导航信号接收天线与发射天线之间倾角的不一致性而导致的载波相位测量中相位缠绕的产生,以及相位缠绕对载波相位测量、定位精度的影响,并通过理论计算得出,载波相位测量中相位缠绕引入的测量误差最大可达厘米量级.计算结果表明,相位缠绕对高精度载波相位测量引入的测量误差不可忽略.在实际的载波相位测量应用中,尽量提高导航信号接收天线与发射天线之间的倾角的一致性,以减小相位缠绕对载波相位测量引入的测量误差,进而获得高精度载波相位测量值.

The successful implementation of the international gravity satellite mission around the Earth，named CHAMP（CHAllenging Minisatellite Payload），GRACE（Gravity Recovery and Climate Experiment）and GOCE（Gravity field and steady-state Ocean Circulation Explorer），and the international satellite gravity measurement program orbiting the Moon，named GRAIL（Gravity Recovery and Interior Laboratory）, and the upcoming launch of the international next-generation Earth’s gravity satellite GRACE Follow-On will usher in an unprecedented high precision and high spatial resolution of the deep space satellite gravity detection era. In this paper，the research background，the necessity，the feasibility study，the construction of the software platform，the orbit perturbation and the future research direction of the deep-space satellite gravity measurement are demonstrated. The deep-space satellite gravity measurement technology has a broad application prospect with regard to the planetary geodesy，the planetary gravity field，planetary physics，the planetary dynamics and the national defense，and the construction for the national economy and the social benefits.

On-board switching has been the development trend of satellite communication. There is electronic bottleneck in the development of on-board ATM switch, so the optical switch is the inevitable direction of future broadband multimedia satellite. The paper brings forward a scheme about on-board mixed optical/electronic switching of GEO, analyses the switching mode of the scheme, discusses the key techniques.

In this paper,on the basis of the costas OPLL configuration,costas OPLL mathematical model and phase noise were showed,then the bandwidth,linewidth and optical power splitting ratio were then analyzed and computed.All these results in this thesis can provide theoretical supportment for intersatellite coherent optical communication system.