Li Gang, Pan Chong, Wu Bo, Xu Zhiliang, Li Shihua, Zhang Yehua, Yang Yongjun, Zou Zhuohang, Shi Chang, Wang Muze
Ji An Electronics Integrated Circuit and Communication Transmission Laboratory Technology Co., Ltd., Ji'an 343000, China.
School of Information and Software Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China.
Micromachines (Basel). 2024 Dec 26;16(1):18. doi: 10.3390/mi16010018.
Wireless sensor networks often rely on battery power, which incurs high costs, considerable volume, and a limited lifespan. Additionally, the communication range of existing passive sensor tags remains short, which challenges their suitability for evolving Internet of Things (IoT) applications. This paper, therefore, presents a long-distance passive RFID sensing tag that integrates multi-source energy harvesting and reflection amplification. Multi-source energy harvesting enhances tag receiving sensitivity and extends the system's downlink communication distance, while reflection amplification increases tag reflection power and improves the uplink communication distance, thereby significantly expanding the overall communication range. The test results show that the tag achieves a receiving sensitivity of -45 dBm, a reflection gain of 44 dB, and a communication distance of up to 96 m.
无线传感器网络通常依赖电池供电，这会带来高昂成本、较大体积以及有限的使用寿命。此外，现有无源传感器标签的通信范围仍然较短，这对它们在不断发展的物联网（IoT）应用中的适用性构成了挑战。因此，本文提出了一种集成多源能量收集和反射放大功能的远距离无源射频识别（RFID）传感标签。多源能量收集提高了标签的接收灵敏度并扩展了系统的下行链路通信距离，而反射放大增加了标签的反射功率并改善了上行链路通信距离，从而显著扩大了整体通信范围。测试结果表明，该标签实现了-45 dBm的接收灵敏度、44 dB的反射增益以及高达96 m的通信距离。
