复杂环境对漏泄圆波导辐射特性的影响  

Influences of complicate environment on the radiation characteristics of the leaky circular waveguide

作　　者：张冲[1,2] 王均宏[1,2] 陈美娥[1,2] 张展[1,2] 李铮[1,2] 

机构地区：[1]全光网络与现代通信网教育部重点实验室,北京100044 [2]北京交通大学光波技术研究所,北京100044

出　　处：《电波科学学报》2015年第3期457-462,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61331002);国家重点基础研究发展计划(2013CB328903)

摘　　要：漏泄圆波导应用于城市轨道交通时,其辐射特性容易受到其附近复杂环境的影响,进而影响到无线通信系统的正常运行.以雪覆盖为例,研究了不同厚度、不同湿度的雪对漏泄圆波导辐射特性的影响,提出了抵抗恶劣环境影响的措施.结果表明:积雪对漏泄圆波导的近场场强影响比较明显,且波导的远场随雪湿度与厚度的增大而降低;通过在漏泄波导表面加一层介电常数接近空气的泡沫塑料层,可以有效降低雪对漏泄波导辐射特性的影响,从而提高无线通信系统的可靠性.When leaky circular waveguide is used in the urban mass transportation,its radiation characteristic might be influenced by the complicate environment,which further affects the quality of the wireless communication.In this paper,using snow coverage as examples,the influences of snow coverage thickness and volumetric wetness on the radiation characteristics of leaky circular waveguide are discussed,the way of reducing the influence of snow coverage is proposed.It is shown by the results that the accumulated snow has significant influence on the near field distributions of the leaky waveguide,and the far field of the leaky circular waveguide is decreased with snow thickness and volumetric wetness.By covering a foam layer on the leaky waveguide,the influence of snow coverage on the radiation characteristics of leaky waveguide can be decreased effectively,therefore,the reliability of the wireless communication systems can be improved.

关 键 词：漏泄圆波导 雪覆盖 辐射特性 防护措施 介质层 

分 类 号：TN814[电子电信—信息与通信工程]