Full Passive UHF Tag With a Temperature Sensor Suitable for Human Body Temperature Monitoring

被引：202

作者：

Vaz, A. ^{[1
,2
]}

Ubarretxena, A. ^{[1
,2
]}

Zalbide, I. ^{[1
,2
]}

Pardo, D. ^{[1
,2
]}

Solar, H. ^{[1
,2
]}

Garcia-Alonso, A. ^{[1
,2
]}

Berenguer, R. ^{[1
,2
]}

机构：

[1] Ctr Estudios & Invest Tecn Guipuzcoa CEIT, Integrated Circuits Commun Syst COMMIC Grp, Dept Elect & Commun, San Sebastian 20018, Spain

[2] Univ Navarra Tecnun, San Sebastian 20018, Spain

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2010年 / 57卷 / 02期

关键词：

CMOS analog front end; digital core; high accuracy; low power; RF identification (RFID); temperature sensor; ultrahigh frequency (UHF);

D O I：

10.1109/TCSII.2010.2040314

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A long-range UHF RF identification (RFID) sensor has been designed using a 0.35-mu m CMOS standard process. The power-optimized tag, combined with the ultralow-power temperature sensor, allows an ID and a temperature reading range of 2 m from a 2-W effective radiated power output power reader. The temperature sensor is based on a ring oscillator, where the temperature dependence of the oscillation frequency is used for thermal sensing. The temperature sensor exhibits a resolution of 0.035 degrees C and an inaccuracy value lower than 0.1 degrees C in the range from 35 degrees C to 45 degrees C after two-point calibration. The average power consumption of the temperature sensor is only 110 nW at ten conversions per second while keeping a high resolution and accuracy. These properties allow the use of the RFID as a batteryless sensor in a wireless human body temperature monitoring system.

引用

页码：95 / 99

页数：5

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