Abstract
The integration of temperature sensor (TS) and UHF RFID technology has attracted wide attention theoretically and experimentally. The architecture, power consumption, temperature measurement range, accuracy, and communication distance are key indicators of the performance of UHF RFID temperature sensor chip (RID-TSC). This work aims to provide a clearer view of the development of UHF RFID-TSC integration technology. After a systematic analysis of the characteristics of ADC, TDC, and FDC used in an integrated TS, the key low-power technologies under different architectures are summarized. Through the observation of the latest researches and commercial products, the development trend of UHF RFID-TSC technology is obtained, including on-chip and off-chip coordination, multiprotocol and multifrequency support, passive wireless sensor intelligence, miniaturization, and concealment.
Highlights
In recent years, the development of Internet of Things (IoT) technology has greatly expanded the function of RFID
This paper focuses on the RFID temperature sensor chip (RID-TSC), which is the integration technology of temperature sensor (TS) and RFID
The results show that the analogto-digital converter (ADC) architecture requires a large chip area and a large amount of power consumption and has the advantages of wide temperature range and high precision
Summary
The development of Internet of Things (IoT) technology has greatly expanded the function of RFID. The new sensor integrated with RFID chip is the bridge of integrating RFID technology into wireless sensor network [1] and IoT applications [2]. In 1988, MIDDelHek first proposed integrating temperature sensor (TS) with RFID [3]. The sensor unit can be directly integrated into the RFID chip circuit [6,7,8, 14]. This paper focuses on the RFID temperature sensor chip (RID-TSC), which is the integration technology of temperature sensor (TS) and RFID.
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