【作者】 李鹏；

【导师】 易克初； 李成斌；

【作者基本信息】 西安电子科技大学 ， 电子与通信工程， 2014， 硕士

【摘要】 无线电定向技术是一种将定向天线与接收设备有机结合，采用特殊的方法测定无线电来波方向的技术，在通信侦察、雷达侦察、无线测控和频谱管理等方面有十分广泛的应用。本文主要研究基于机械伺服天线的无线定向系统，开发一款体积小、功能强、具有定位功能的测向机。本文总结了作者在参与研制的一个无线定向系统工程样机中的有关工作，包括系统总体和各个部分的设计、设备研制、系统联调和性能测试；具体内容有：(1)在分析各种形式的定向天线性能特点的基础上，选择了采用伺服电机实现天线方向性的变化，达到来波方向高精度定向测量的目的的总体方案。(2)进行了一个无线定向系统的总体设计，包括机械伺服天线系统、超高频接收机、自动定向电路和人机交互界面；描述了基本结构、技术指标的分配和实现，各部分关键部件和器件的选型，各单元电路的设计和研制。（3）鉴于本系统工作频段较宽的特点，对频率合成单元进行了特殊设计，阐述了设计思路，讨论了关键元器件的选型，及其对系统总体性能指标的影响。（4）考虑到系统应用的方便性和人性化，对于定向结果显示界面、人机交互操作等环节，进行了精心设计。作者参与研制无线定向系统设备，已完成工程样机研制，性能测试结果表明，系统性能达到预期要求。更多还原

【Abstract】 Radio direction finding is a technique to find the direction of arriving wave bymeans of special method based on the combination of direct antenna and receiver,which has found wide applications in multiple areas such as communication spying,radar spying, radio measurement/control and radio frequency spectrum management.This thesis mainly researches on a radio direction finding system based on a mechanicalservo antenna, aiming at developing a portable one with strong functions includingpositioning.The thesis summarizes the development of a portable engineering prototype ofradio direction finding system, which the author joined in, including the design of thetotal system and all the constitutive units, system debugging and performance testing;the detail is as follows.(1) Through analyzing the characteristics of various directing antennas, a schemeof high accuracy direction measuring system is designed, which finds direction ofarriving wave based on direction variation of the antenna driven by a servoelectromotor.(2) The total system and all the constitutive units are designed, including themechanical servo antenna, the ultra-high-frequency receiver, automatically directionfinding circuit and the man-machine interactive interface. The thesis describes theconfiguration of every units, the assignment and realization of various techniquespecifications, type selection of some key parts and chips, as well as design andmanufacture of circuits of these units.(3) Considering the frequency band of the system is rather wide, the author pay agreat attention to design of frequency synthesizer. After presenting the design idea, thethesis discusses the type selection of some key devices as well as its affection to theperformance of the whole system.(4) For the sake of convenience and human-like behavior in practical applicationsof the system, the interface of the results display and man-machine interactive operationis aboratively designed.The engineering prototype is successfully developed and tested, the results showthat the performance of the system reaches the expectation..更多还原