摘要
随着无线通信应用的迅速发展,频谱资源日益紧张,利用传统平面电磁波优化通信链路的传输能力和通信容量已捉襟见肘。为解决这个问题,学术界引入光通信中广泛应用的轨道角动量(Orbital Angular Momentum,OAM),并利用涡旋电磁场进行OAM调制或OAM复用,已初见成效。为此,介绍OAM的螺旋相位波前结构,梳理总结几种典型的适用于微波通信的OAM产生方法及适用于无线通信接收和检测的OAM模式数确定方法,分析了由于OAM波束中心极点、空间传播干扰和天线小型化困难等因素造成的OAM推广应用困境,并给出了相应的研究方向。
With the rapid development of wireless communication applications,the spectrum resources become increasingly strained,and traditional planar electromagnetic wave could not further optimize the transmission and communication capacity of communication links.To solve this problem,OAM（Orbital Angular Momentum） widely used in optical communications,is introduced to the academia,OAM modulation and OAM multiplexing using vortex electromagnetic field now achieves initial success.Firstly the helical phase wave-front structure of OAM is described.Then,the techniques and methods of OAM generation,reception and detection for wireless communication are combed out,and the difficulties in coping with the center pole of OAM waves,space propagation interference and antenna miniaturization also analyzed.And finally the corresponding research directions are presented.
出处
《通信技术》
2017年第9期1883-1890,共8页
Communications Technology
关键词
无线通信
轨道角动量
涡旋电磁波
天线
wireless communication
orbital angular momentum
vortex electromagnetic wave
antenna
