摘要
以海上超短波通信为背景,分析了影响海上超短波通信距离的几种相关因素,并得出了其主要因素是天线高度且给出天线高度的设计方法。介绍了超短波通信的信道特性,给出了无线视距传播的几何视距及有效视距的计算方法;分析了通信天线的特性参数,给出了天线辐射功率、天线效率、天线方向性系数及天线增益的详细计算过程;对影响海上超短波通信距离的各种因素进行了理论分析,得出了影响海上超短波通信距离的主要因素是天线高度的结论;给出了超短波通信天线高度设计的方法,为海军舰艇超短波通信天线的设计及架设提供了理论支撑。
Taking ultrashort wave communication at sea as background,analyses several related factors which gives impacts on marine VHF communication distance and gets the conclusion that antenna height is the crucial factor.It also provides he mathod of ultra-short wave communication antenna height design.This paper introduces the characteristics of ultrashort wave communication channel and comes to the calclusion of geometric sight and effective sight of the wireless radio;it anases characteristic parameters of the antenna and provides the detailed calclusion course of antenna radiated power,antenna efficiency,antenna directivity and antenna gain coefficient;it analyses various factors which give impacts on marine ultra-short wave communication,thus gets a conclusion that the main factor which affects marine ultra-short wave communication distance is the antenna height;it gives the mathod of ultra-short wave communication antenna height design,which provides a theoretical support to ultra-short wave communication antenna design and set up on the navy ships.
出处
《舰船科学技术》
2010年第6期88-90,127,共4页
Ship Science and Technology
关键词
超短波
通信距离
天线高度
ultra-short wave
communication distance
antenna height
