可见光通信中光学天线的研究

可见光通信作为一种结合了照明与通信的新型无线通信技术，近几年成为一个研究的热点.光学天线是可见光通信系统中的重要组成部分，在优化光能分布、提高接收功率、提升系统信噪比和通信质量方面起重要作用.目前国内外对于光学天线的研究可以分为发射天线和接收天线两个部分.发射天线一般与LED光学设计相结合，按照配光方式可以分为准直型、均匀照明型和聚焦型等类型.接收天线采用复合抛物面聚光器、菲涅尔透镜等光学元件作为光学接收前端，主要目的是提高接收信号的功率.本文介绍了近年来国内外光学天线的研究进展，评价并比较了各种类型光学天线的光学性能，并对光学天线的发展趋势做出了展望.

Research of optical antenna technology in visible light communication

As a new wireless communication technology combined illumination with communication,visible light communication has become attractive recently.Optical antenna plays a significant role in visible light communication system for it can optimize the light intensity distribution,enhance the received optical power,and improve the signal to noise ratio of the system.Research on optical antenna is mainly focused on the transmitting antenna or the receiving antenna.Transmitting antenna is usually combined with LED optical design,which can be divided into collimation type,uniform illumination type,and focus type according to the light intensity distribution.Receiving antenna uses composite parabolic concentrator (CPC),Fresnel lens or other optical components as the optical receiving front end to enhance the received optical power.In this paper,the research of optical antenna at home and abroad is introduced.The optical performance of the optical antenna is evaluated and compared,and finally the development trend of the optical antenna is forecasted.