大气湍流中涡旋电波传输的螺旋谱特性  

Spiral Spectrum Characteristics of Vortex Waves Propagating in Atmospheric Turbulence

作　　者：张华杰 赵恒凯[1] ZHANG Huajie;ZHAO Hengkai(School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学通信与信息工程学院,上海200444

出　　处：《移动通信》2018年第11期56-61,共6页Mobile Communications

基　　金：国家自然科学基金项目(61271061);国家自然科学基金项目(61132003)

摘　　要：以随机相位屏模型来模拟大气湍流,研究涡旋电波包括波长、拓扑荷等在内的自身参量和包括大气湍流强度、传输距离等在内的传输介质参量对其轨道角动量特性的影响,发现涡旋电波在大气湍流中传输时会产生螺旋谱弥散,且弥散程度主要受波长、拓扑荷、大气湍流强度和传输距离的影响,涡旋电波的径向指数和束腰半径以及大气湍流的内尺度和外尺度对螺旋谱弥散现象的影响比较有限,该结论对涡旋电波在大气湍流中传输特性的研究有一定意义。The impacts of the vortex wave parameters including wavelength and spiral mode number and the transmission medium parameters including atmospheric turbulence intensity and transmission distance are investigated to simulate atmospheric turbulence by using the random phase screen model. It is discovered that spiral spectrum dispersion would appear when the vortex wave propagates in atmospheric turbulence. Moreover, the dispersion degree is mainly influenced by wavelength, spiral mode number, atmospheric turbulence intensity and transmission distance. The vortex wave mode number and waist radius, as well as the internal scale and external scale of atmospheric turbulence only have a limited effect on spiral spectrum dispersion. The conclusions are of great significance to the study of propagation characteristics of vortex waves propagating in atmospheric turbulence.

关 键 词：涡旋电波 轨道角动量 大气湍流相位屏 螺旋谱 

分 类 号：TN925[电子电信—通信与信息系统]