室内可见光通信多阵元发射天线优化设计

摘要

基于一种新的白光LED发光模型,对室内可见光通信系统多白光LED阵元发射天线进行了优化设计.分析了多阵元发射天线的阵元分布、阵元光轴极角、阵元层间距、阵元数目等参数对室内光功率分布的影响,给出了设计参数的优化选择方法和原则.并通过控制发射光功率的方法,实现了光功率分布为平顶形的多阵元天线设计.通过仿真和实验研究验证了所提出的优化设计方法.%A multi-element transmitting antenna composed of white LEDs based on a new white LED radiation model is designed. Effects of parameters used in the design on the distribution of received indoor power are studied, including element layout, LED optical axis polar angle, layer distance, and number of elements.Based on simulation, reasonable design parameters of the transmitting antenna are presented. By controlling transmitted power of the LED, a design method for transmitting antenna with flat-top distribution of received power is obtained. Simulation and experiments verify the new white LED radiation model.