一个读取范围和频率可重新配置的天线,用于近场和远场UHF RFID应用
1Department of Electrical and Electronic Engineering, The University of Manchester, Manchester M13 9PL, UK.
Sensors (Basel, Switzerland)
|January 25, 2025
概括
本研究介绍了用于射频识别 (RFID) 系统的可重新配置天线. 这种新的设计解决了频谱政策问题,并改善了全球超高频RFID应用的读取范围.
科学领域:
- 电气工程 电气工程
- 电磁学 电磁学 电磁学 电磁学
- 天线理论天线理论
背景情况:
- 无线电频率识别 (RFID) 系统面临挑战,原因是国际频谱政策的变化和标签的误读.
- 现有的RFID阅读器天线往往缺乏灵活性来适应各种全球法规和运营要求.
研究的目的:
- 为超高频 (UHF) RFID 阅读器提供可重新配置的天线,以克服不同频谱政策所造成的限制.
- 通过单一的,可适应的天线设计,增强近场和远场RFID阅读能力.
主要方法:
- 使用一个复合的右/左转输电线 (CRLH-TL) 基于一个周期电容间隙负载平行板线.
- 在CRLH-TL中实现零级共振,以创建具有相内辐射电流的循环天线,以获得强大的H场和全向图案.
- 包含可调节元件,使频率和读取范围可以进行调整.
主要成果:
- 该天线显示频率调范围从833MHz到979MHz,覆盖全球UHFRFID频段.
- 每种运行模式都具有狭窄的频段,这有助于遵守各种国家无线电频率政策.
- 实现了可调节的近场查询区域 (400 mm × 400 mm × 50 mm) 和可调节的远场读取距离 (0.35 m 到 2.71 m).
结论:
- 拟议的CRLH-TL可重新配置天线有效地解决了频谱政策的变化,并提高了RFID系统的灵活性.
- 该设计通过提供单一的,可适应的解决方案,简化了多版本RFID阅读器的开发.
- 这种天线技术为近距离和远距离RFID应用提供了显著的改进,使其在全球范围内得到更广泛的采用.
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