Abstract：The rectification efficiency of rectifier in UHF tag chip is one of the main factors affecting the communication distance of the tag. Currently many commercial tags do not have the test ports, hence the probe measurement method is no longer applicable for the test of tag chip. Based on UHF-RFID wireless communication principle and the rectifier works principle, a comparison relationship between UHF-RFID chip impedance and rectification efficiency was provided. Then a wireless measurement method for rectification efficiency of rectifier in UHF tag chip was proposed. It is shown that, when the input power of chip is within [-18, -13]dBm, the results of wireless measurements are basically same as those of theoretical analysis and probe measurements, where the rectification efficiency is less than 46% and the error is less than 4.8%. Compared with the probe measurement, the wireless measurement method need not to destroy the encapsulation structure of tags.
李兵, 李自愿, 何怡刚, 佐磊. 标签芯片整流器整流效率的无线测量[J]. 电工技术学报, 2017, 32(18): 196-201.
Li Bing, Li Ziyuan, He Yigang, Zuo Lei. The Wireless Measurement of Rectification Efficiency of Tag Chip Rectifier. Transactions of China Electrotechnical Society, 2017, 32(18): 196-201.
[1] 李兵, 何怡刚, 佘开, 等. 基于雷达截面差值的标签通信误码率分析和测量[J]. 仪器仪表学报, 2010, 31(12): 2815-2820. Li Bing, He Yigang, She Kai, et al. Analysis and measurement of bit error rate for tag communication based-on delta radar cross section[J]. Chinese Journal of Scientific Instrument, 2010, 31(12): 2815-2820. [2] 龚刚军, 孙毅, 蔡明明, 等. 面向智能电网的物联网架构与应用方案研究[J]. 电力系统保护与控制, 2011, 39(20): 52-58. Gong Gangjun, Sun Yi, Cai Mingming, et al. Research of network architecture and implementing scheme for the internet of things towards the smart grid[J]. Power System Protection and Control, 2011, 39(20): 52-58. [3] 霍池, 石夏琴, 何怡刚. 智能电网中射频识别技术的研究[J]. 电工技术学报, 2013, 28(2): 383-386. Huo Chi, Shi Xiaqin, He Yigang. The research of RFID technology for smart grid[J]. Transactions of China Electrotechnical Society, 2013, 28(2): 383- 386. [4] Yuan Yao, Jie Wu, Yin Shi, et al. A fully integrated 900MHz passive RFID transponder front end with novel zero-threshold RF-DC rectifier[J]. IEEE Transactions on Industrial Electronics, 2009, 56(7): 2317-2325. [5] Theilmann P T, Presti C D, Kelly D, et, al. Near zero turn-on voltage high-efficiency UHF RFID rectifier in silicon-on-sapphire CMOS[C]//IEEE Radio Frequency Integrated Circuits Symposium (RFIC), Anaheim, CA, 2010: 105-108. [6] Raben H, Borg J, Johansson J. Improved efficiency in the CMOS cross-connected bridge rectifier for RFID applications[C]//MIXDES 18th International Con- ference Mixed Design of Integrated Circuits and Systems, Gliwice, Poland, 2011: 334-339. [7] Raben H, Borg J, Johansson J. Design of voltage multipliers for maximized DC generation in inductively coupled RFID tags[J]. IEEE Transactions on Circuit and Systems I: Regular Papers, 2014, 61(11): 3309-3317. [8] Kotani K, Ito Takashi. High efficiency CMOS rectifier circuits for UHF RFIDs using vth cancellation techniques[C]//IEEE 18th International Conference on ASIC, Changsha, 2009: 549-552. [9] Kamalinejad P, Keikhosravy K, Mirabbasi S, et al. An efficiency enhancement technique for CMOS rectifiers with low start-up voltage for UHF RFID tags[C]//International Green Computing Conference (IGCC), Arlington, VA, 2013: 1-6. [10] 赵争鸣, 王旭东. 电磁能量收集技术现状及发展趋势[J]. 电工技术学报. 2015, 30(13): 1-11. Zhao Zhengming, Wang Xudong. The state-of-the-art and the future trends of electromagnetic energy harvesting[J]. Transactions of China Electrotechnical Society, 2015, 30(13): 1-11. [11] Bjorninen T, Lauri M, Ukkonen L, et al. Wireless measurement of RFID IC impedance[J]. IEEE Transactions on Instrumentation and Measurement, 2011, 41(6): 3194-3206. [12] 神显豪, 杨小平. 基于RSSI的WSN节点改进质心定位算法[J]. 微计算机信息, 2010, 26(11): 213-214. Shen Xianhao, Yang Xiaoping. Improve RSSI-based centroid localization algorithm for wireless sensor networks[J]. Microcomputer Information, 2010, 26(11): 213-214. [13] De Donno D, Catarinucci L, Tarricone L. An UHF RFID energy-harvesting system enhanced by a DC- DC charge pump in silicon-on-insulator techno- logy[J]. IEEE Microwave and Wireless Components Letters, 2013, 23(6): 315-317. [14] Catarinucci L, De Donno D, Colella R, et al. A cost- effective SDR platform for performance characteri- zation of RFID tags[J]. IEEE Transactions on Instru- mentation and Measurement, 2012, 61(4): 903-911. [15] Ebrahimian M, El-Sankary K, El-Masry E. Enhanced RF to DC CMOS rectifier with capacitor- bootstrapped transistor[C]//Proceedings of IEEE International Symposium on Circuits and Systems (ISCAS), Pairs, 2010: 1655-1658. [16] Liu D S, Li F B, Zou X C, et al. New analysis and design of a RF rectifier for RFID and implantable devices[J]. Sensors, 2011, 11(7): 6494-6508.
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