FPGA的UHF RFID只读读写器设计

Design of Read-only UHF RFID Reader Based on FPGA

本设计是基于EPCC1G2协议的UHF RFID读写器的FPGA(Field-Programmable Gate Array)实现。在射频发射模块采用OOK(On-OffKeying)调制;高频载波使用跳频设计;功放的工作状态可控,降低了功耗。射频接收模块采用微带线移相网络四路混频;解调信号由低噪放放大;利用比较器实现模数转换及"盲点"的判断。使用定向耦合器实现收发隔离。数字基带部分由FPGA实现,提高了读写器的速度,并完成了读写器防碰撞算法及其与计算机交互的PS/2接口。

Based on EPC C1G2 protocol,this design realizes the UHF RFID reader using FPGA（Field-Pro- grammable Gate Array）.ln the RF transmitter pathway,it adopts OOK （On-Off Keying） modulation and fre-quency hopping design and working condition controlle of amplifier reduces the power consumption of system.The receiver uses phase shift network based on microstrip line in four road detection,and the de-modulated signal is amplified by LNA,finally it uses the comparator to realized AD convertion and judgment of ＂blind spot＂.Digital baseband is realized by FPGA,which has greatly improved the reader＇s rate;the reader also realizes anti-collision algorithm and the interface of PS/2 with the computer.