摘要
有效的功耗管理是提升有源RFID标签以及无线传感器节点电池使用寿命的重要方法,一种无源射频唤醒电路可以用来控制标签以及传感器节点的工作状态,使之在外界无线电波控制下进行唤醒状态与休眠状态的切换,与传统周期性唤醒方法相比,该方法减少了大量能量损耗。围绕着提高射频唤醒电路灵敏度的指标,对阻抗匹配网络以及整流电路进行了优化。仿真和测试结果表明该电路在-27.7dBm输入功率下可以产生220mV直流输出。该唤醒电路本身无需耗电,实践表明将其应用在RFID标签及无线传感器节点设计中可显著提升电池使用寿命。
Power management is an important technique to prolong the lifetime of active RFID tag and wireless sensor. A passive radio-triggered based wake-up circuit is proposed to control the activation and shutting down of the active RFID tag and wireless sensor, and thus eliminates energy wasting wake-up periods. The radio-triggered wake-up circuit is optimized to achieve maximum sensitivity by characterizing both the impedance transformation network and the rectifier circuit. The simulation and measurement results show that the circuit can produce a DC output of 220mV with the received power as low as - 27.7dBm. The wake-up circuit is passive and practice indicates that the lifetime of the active RFID tag and wireless sensor is obviously prolonged.
出处
《微波学报》
CSCD
北大核心
2009年第4期69-73,共5页
Journal of Microwaves
作者简介
王洁博士生。主要研究方向为无线传感器网络、RFID、无线自组织网络等。E-mail：wangjie@dlut．edu．cn
高庆华博士在读。主要研究方向为无线通信、模式识别等。
王洪玉教授，博士生导师，主要从事无线网络、移动通信方面的研究。
