A Reusable Battery-Free RFID Temperature Sensor
A Reusable Battery-Free RFID Temperature Sensor
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DOI：
10.1109/tap.2019.2921150
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发表时间：
2019-10-01
影响因子：
5.7
通讯作者：
Georgakopoulos, Stavros V.
中科院分区：
文献类型：
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作者：
Shafiq, Yousuf;Gibson, John S.;Georgakopoulos, Stavros V.
提出了一种新型无源射频识别（RFID）温度传感器，用于冷链中食品、药品等易腐物品周围环境的温度监测。具体来说，当温度上升或福尔斯下降超过某个阈值时，该传感器在902和928 MHz之间自调谐，在RFID UHF频带中工作。这种无源传感器的新奇在于它能够在多个高/低温循环中工作。该设计由一个平面偶极子天线与定制的集成T匹配网络（ITMN），是在接地平面上驱动。驱动改变工作频率，并由液晶弹性体（LCE）控制，LCE是可编程和可逆的温度依赖性聚合物。因此，我们的设计可以重新配置为在LCE设计工作的各种温度范围内工作。进行分析，以检查所提出的传感器附近的实际项目的性能，当它是在接近一个额外的传感器与不同的方向。最后，传感器的性能进行了验证，通过全波模拟使用ANSYS HFSS和测量。模拟和测量都与理论吻合得很好。
A new passive radio frequency identification (RFID) temperature sensor is presented for monitoring the temperature of the surrounding environment of perishable goods, such as foods and medicines, in the cold supply chain. Specifically, this sensor self-tunes between 902 and 928 MHz, operating in the RFID UHF band, as the temperature rises or falls beyond a certain threshold. The novelty of this passive sensor is its ability to operate through multiple high-/low-temperature cycles. The design consists of a planar dipole antenna with a customized integrated T-match network (ITMN) that is actuated above a ground plane. The actuation shifts the operating frequency and is controlled by liquid crystal elastomers (LCEs), which are programmable and reversible temperature-dependent polymers. As a result, our design can be reconfigured to operate at various temperature ranges for which the LCE is designed to operate. The analysis is performed to examine the performance of the proposed sensor near practical items and when it is in close-proximity to an additional sensor with varying orientation. Finally, the sensor's performance was validated through full-wave simulations using ANSYS HFSS and measurements. Both the simulation and measurements agreed well with theory.