射频识别系统电波传播模型与仿真  

Research on Radio Wave Propagation Model of RFID System and Simulation

作　　者：程鹏亮[1] 戎蒙恬[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《计算机仿真》2008年第2期322-324,335,共4页Computer Simulation

基　　金：国家自然科学基金委创新研究群体基金项目(60521002);国家科技部科技攻关项目(2005BA908B02);上海市科委项目(05dz05802)

摘　　要：通过建立合适的电波传播模型,可以利用MATLAB仿真工具来分析射频识别系统的电波传播特性。现有的电波传播模型中,缺少对阅读器和电子标签间相对位置、方向和极化关系的考虑。在分析射频识别系统基本原理和特点的基础上,建立一种改进的自由空间下的超高频射频识别系统的电波传播模型。此模型中阅读器和电子标签的位置和方向可以自由选择,并且考虑了电波传播中的极化因素。通过仿真试验,得到阅读器电子标签的位置和方向与信号衰减的关系,验证了该模型在的自由空间中远场条件下的有效性。Through the establishment of appropriate radio wave propagation model, MATLAB simulation tool can be used to analyze the radio wave propagation characteristics of Radio Frequency Identification system. The existing radio wave propagation model is lack of consideration of relative position, direction and polarization between reader and tag. Based on the analysis of basic principle and characteristics of RFID, an improved free - space UHF propa- gation model was founded. In this model, reader and tag＇s position and direction can be chose freely as parameters, and polarization is taken into consideration. Through simulation test, the relationship between signal attenuation and reader, tag＇s position ＆ direction can be get, which validates the model in the free space under the conditions of long - range.

关 键 词：射频识别 天线 传播 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]