CAJ | 학술논문

介绍了一种基于AS3992芯片的远距离RFID读写器设计。通过AS3992内部集成的模拟前端和协议处理系统，配合基带的MCU控制，实现了在通信频率840MHz-960MHz内发射功率可调、天线接口可切换等实用功能。为了达到更远的传输距离，使用了多种阻抗匹配网络对微带线阻抗进行微调，且对输出功率加以检测，有效防止了盲目增大发射功率导致接收干扰而影响识别距离的问题。设计了4个天线接口，扩展了读写器的应用距离，同时减少了单天线的盲区，降低了误码率。
개소료일충기우AS3992심편적원거리RFID독사기설계。통과AS3992내부집성적모의전단화협의처리계통，배합기대적MCU공제，실현료재통신빈솔840MHz-960MHz내발사공솔가조、천선접구가절환등실용공능。위료체도경원적전수거리，사용료다충조항필배망락대미대선조항진행미조，차대수출공솔가이검측，유효방지료맹목증대발사공솔도치접수간우이영향식별거리적문제。설계료4개천선접구，확전료독사기적응용거리，동시감소료단천선적맹구，강저료오마솔。
A long-range RFID reader based on AS3992 chip is introduced, which has integrated analog front-end and protocol processing system. By means of the MCU controling,this design realizes the practical functions of adjustable transmit power and antenna port switching in the communication frequency 840 MHz-960 MHz. In order to achieve longer transmission distance, a variety of impedance matching networks are used to fine-tune the impedance of the mierostrip line and detect the output power to be effective to prevent blindly increasing the transmission power in order to avoid the problem of interference in the identification distance. In addition, four antenna interface is designed to extend the reader＇s distance and reduce the blind spots so that to reduce the error rate.