无线通信中泄漏同轴电缆的传输衰减模型  

Transmission Attenuation Model of Leaky Coaxial Cable in Wireless Communication

作　　者：郭进喜[1] 刘扬[1] 刘中华 李申月 GUO Jin-xi;LIU Yang;LIU Zhong-hua;LI Shen-yue(School of Mechanical Electronic&Information Engineering,China University of Mining and Technology(Beijing),Beijing 10083,China;Jiangsu Hengxin Technology Co.,Ltd.Yixing 214222,China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083 [2]江苏亨鑫科技有限公司,宜兴214222

出　　处：《科学技术与工程》2018年第7期143-146,共4页Science Technology and Engineering

基　　金：国家自然科学基金(5164027)资助

摘　　要：漏缆无线通信系统在铁路隧道中应用越来越广泛,目前漏缆的研究大多是针对漏缆结构设计和外部辐射模式进行展开的。在根据漏缆的等效电路图,计算漏缆的阻抗和导纳,建立漏缆的数学模型。在外部模式耦合影响下,定义了弱耦合系数,得出了漏缆的传输衰减模型。通过仿真计算得出衰减和频率的关系图,衰减随频率增大而增大;并通过对1/2″漏缆进行实验,得出漏缆衰减的实测值和衰减模型仿真结果的一致性。The application of the leaky cable wireless communication system in railway tunnels is more and more widely.At present,most of the research on the leaky cable is carried out for the design of the leaky cable and the external radiation mode.Based on the equivalent circuit diagram of the leaky cable,the impedance and admittance of the leaky cable are calculated,and the mathematical model of the leaky cable is established.In the influence of external mode coupling,weak coupling coefficient is defined,and the transmission attenuation model of the leaky cable is obtained.The relation between attenuation and frequency is obtained by simulation,it show that the attenuation increases with frequency.Through the experiment of(1/2)″leaky cable,the consistency between the measured value of attenuation of cable and the attenuation model is obtained.

关 键 词：漏缆 传输衰减 耦合系数 衰减模型 

分 类 号：TM248[一般工业技术—材料科学与工程]