Energy Autonomous Dual-Band Antenna System for RFID-Based Real-Time Battery Level Monitoring

IF 3.5 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Braden P. Smyth;Hamed Khoshniyat;Mahdi Barati;Samuel Clark;Rashid Mirzavand;Ashwin K. Iyer
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Abstract

This paper presents an energy-autonomous antenna system that combines energy harvesting (EH) with radio frequency identification (RFID) communication to measure the battery charge level in real time. The system employs a dual-band patch antenna, a dual-band matching stub, and a diplexer, which are designed with metamaterial-based electromagnetic bandgap technology (MTM-EBG). Due to the MTM-EBG’s uniplanar and via-less design, it can be directly embedded into the antenna and microstrip feed components, thereby contributing to their compactness, lowering cost, and simplifying fabrication. The RFID and EH portions of the system operate at frequencies of 915 MHz and 2.48 GHz, respectively. This system operates by rectifying RF power in the EH band in order to charge a supercapacitor battery, while a varactor imparts phase to the backscattered RFID signal. The phase of reflection is related to the level of charge in the battery, which is then read by the RFID reader. By acquiring the tag and charging information without power, this structure is energy autonomous, so there is no need for a permanent power source that will need to be replaced over time. Using supercapacitors or rechargeable batteries, the proposed structure can provide power for critical functions while monitoring their charging status remotely. The antenna system and RFID/EH architecture have been fabricated and measured, and battery level monitoring has been demonstrated.
基于 RFID 的实时电池电量监测的能源自主双频天线系统
本文介绍了一种能量自主天线系统,该系统将能量收集(EH)与射频识别(RFID)通信相结合,可实时测量电池电量。该系统采用基于超材料电磁带隙技术(MTM-EBG)设计的双频贴片天线、双频匹配桩和双工器。由于 MTM-EBG 的单平面和无通孔设计,它可以直接嵌入天线和微带馈电元件中,从而有助于它们的紧凑性、降低成本和简化制造。系统的 RFID 和 EH 部分的工作频率分别为 915 MHz 和 2.48 GHz。该系统通过整流 EH 波段的射频功率来为超级电容器电池充电,而变容器则为反向散射的射频识别(RFID)信号提供相位。反射相位与电池中的电量有关,然后由 RFID 阅读器读取。这种结构无需电源即可获取标签和充电信息,因此无需长期更换的永久电源。利用超级电容器或可充电电池,拟议的结构可为关键功能提供电源,同时远程监控其充电状态。天线系统和 RFID/EH 架构已经制作完成并进行了测量,电池电量监测也已演示。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
6.50
自引率
12.50%
发文量
90
审稿时长
8 weeks
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