A wide-band, compact size, long-range surface-tolerant ultrahigh frequency (UHF) radiofrequency identification (RFID) sensor is proposed for internet of things (IOT) applications. The proposed sensor is designed and fabricated on a rigid FR4 substrate. The equivalent circuit analysis is performed to validate the performance of the sensor. The RFID tag exhibits a wide bandwidth of 455 MHz, long reading range with a compact size (931 mm\(^{\mathrm {2}}\)) in comparison to the existing designs. The maximum reading range is found to be 11 m in free space. The long reading range, good surface tolerance and compact size make the design fit for potential RF identification applications. The performance of the designed RFID sensor is experimentally verified by mounting it on different types of surfaces.

提出了一种用于物联网 (IOT) 应用的宽带、紧凑尺寸、长距离表面耐受超高频 (UHF) 射频识别 (RFID) 传感器。所提出的传感器是在刚性 FR4 基板上设计和制造的。执行等效电路分析以验证传感器的性能。与现有设计相比，RFID 标签具有 455 MHz 的宽带宽、长读取范围和紧凑的尺寸（931 mm \(^{\mathrm {2}}\)）。在自由空间中发现最大读取范围为 11 m。长读取范围、良好的表面公差和紧凑的尺寸使该设计适合潜在的射频识别应用。通过将其安装在不同类型的表面上，对设计的 RFID 传感器的性能进行了实验验证。