基于相控阵天线的RFID系统设计

设计了一种可扩展阅读范围的相控阵天线RFID系统。采用Intel R1000阅读器开发平台、MASWSS0204开关芯片,研制了功率分配器、移相器、天线阵,搭建了符合ISO 18000-6C和EPC globalGen 2标准、中心频率为915 MHz RFID阅读器系统。系统引入相控阵原理,并对阅读器进行了简单改动,设计了相控阵RFID系统的硬件组成结构和软件工作流程。设计的相控天线阵列由2×2个微带天线单元、3个功率分配器和1个移相器组成,使用FR4介质板材料制作。实验结果表明,该系统增大了RFID信号的覆盖范围。

Design of RFID system based on phased antenna array

A RFID system based on phased antenna array which could extend the coverage of reader system was designed.The system consisted of the Intel R1000 reader development platform,the switch chip MASWSS0204,the power divider,phase shifters and antenna array.The center frequency of this system was 915 MHz in accordance with ISO 18000-6C and EPC global Gen 2 standard.The phased array principle was introduced by the system and a simple change was carried out on the reader platform.The structure of the hardware and software operating process were also designed.The phased antenna array had four microstrip patch antennas,three Wilkinson power dividers and a transmission line phase shifter printed on the FR4 substrate.The experimental results indicate that the system extends the coverage of RFID signals compared to the existing RFID systems.