用于RFID的自动天线调谐系统的设计  

Design of antenna auto-matching system for RFID

作　　者：解光军[1] 顾云海[1] 夏禹根[1] 

机构地区：[1]合肥工业大学应用物理系

出　　处：《电子测量与仪器学报》2009年第3期49-53,共5页Journal of Electronic Measurement and Instrumentation

基　　金：安徽省优秀青年科技基金(编号:06042086)资助项目

摘　　要：天线作为射频识别(RFID)系统的重要组成部分,直接影响着其性能和稳定性,其中天线的输入阻抗是一个极易变化的参数,自动调谐是解决输入阻抗匹配的有效手段。本文设计了一个用于RFID的自动天线调谐系统,该系统包括自动调谐网络、测量、控制和天线4个部分,其中核心部分采用了基于改进遗传进化的控制算法,通过调节反向电压来实现天线输入阻抗匹配。结果表明,该系统很好地实现了高速自动天线调谐。Acting as an important part, antenna has a direct impact on the performance and stability of the radio frequency identification system, in which input impedance is a parameter changed easily, auto-matching is an effec- tive method to solve this problem. In this paper, an antenna auto-matching system for RFID is designed, the system includes four parts, i. e. auto-matching network, measurement, control and antenna,in which the central part is the controlling algorithm based on modified genetic evolution. The algorithm achieves the goal of input impedance matching through the reverse voltage adjustment. At last, the experiment results show that the system can realize high-speed antenna auto-matching.

关 键 词：自动调谐 天线 RFID 

分 类 号：TP272[自动化与计算机技术—检测技术与自动化装置]