A Self-Powered UHF Passive Tag for Biomedical Temperature Monitoring

被引:2
作者
Zamora-Mejia, Gregorio [1 ,2 ]
Martinez-Castillo, Jaime [3 ]
Diaz-Sanchez, Alejandro [2 ]
Rocha-Perez, Jose M. [2 ]
Herrera-May, Agustin L. [3 ,4 ]
Zapata-Rodriguez, Uriel G. [5 ]
Carbajal-Gomez, Victor H. [1 ,2 ]
机构
[1] CONACyT, Consejo Nacl Ciencia & Tecnol, Ciudad De Mexico 03940, Mexico
[2] INAOE, Inst Nacl Astrofis Opt & Elect, Puebla 72840, Mexico
[3] UV, Ctr Invest Micro & Nanotecnol, Veracruz 94294, Mexico
[4] Univ Veracruzana, Fac Ingn Construcc & Habitat, Ingn Aplicada, Boca Del Rio 94294, Mexico
[5] Univ Veracruzana, Fac Ingn, Veracruz 94294, Mexico
关键词
temperature sensor; self-powered; biomedical; power harvester; dipole antenna; voltage regulator; temperature compensated current source; ring oscillator; CMOS; FLEXIBLE SENSORS; REFERENCE CIRCUIT; IMPLEMENTATION; RECTIFIER; DESIGN;
D O I
10.3390/electronics11071108
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Self-powered RF passive sensors have potential application in temperature measurements of patients with health problems. Herein, this work presents the design and implementation of a self-powered UHF passive tag prototype for biomedical temperature monitoring. The proposed battery-free sensor is composed of three basic building blocks: a high-frequency section, a micro-power management stage, and a temperature sensor. This passive temperature sensor uses an 860 MHz to 960 MHz RF carrier and a 1 W Effective Isotropic Radiated Power (EIRP) to harvest energy for its operation, showing a read range of 9.5 m with a 13.75 mu W power consumption, and an overall power consumption efficiency of 10.92% was achieved. The proposed device can measure temperature variations between 0 degrees C and 60 degrees C with a sensitivity of 823.29 Hz/degrees C and a standard error of 13.67 Hz/degrees C over linear regression. Circuit functionality was validated by means of post-layout simulations, characterization, and measurements of the manufactured prototype. The chip prototype was fabricated using a 0.18 mu m CMOS standard technology with a silicon area consumption of 1065 mu m x 560 mu m. The overall size of the self-powered passive tag is 8 cm x 2 cm, including both chip and antenna. The self-powered tag prototype could be employed for human body temperature monitoring.
引用
收藏
页数:33
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