Magnetic SAW RFID Sensor Based on Love Wave for Detection of Magnetic Field and Temperature

被引：6

作者：

Mengue, Prince ^{[1
]}

Meistersheim, Laurine ^{[1
]}

Hage-Ali, Sami ^{[1
]}

Floer, Cecile ^{[1
]}

Petit-Watelot, Sebastien ^{[1
]}

Lacour, Daniel ^{[1
]}

Hehn, Michel ^{[1
]}

Elmazria, Omar ^{[1
]}

机构：

[1] Univ Lorraine, CNRS, IJL, F-54000 Nancy, France

来源：

IEEE JOURNAL OF RADIO FREQUENCY IDENTIFICATION | 2023年 / 7卷

关键词：

Surface acoustic wave sensors; RFID; magnetic field sensor; temperature sensor; temperature compensation; multifunctional sensor;

D O I：

10.1109/JRFID.2023.3299704

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：

Magnetic field measurement including a temperature compensation is essential for a magnetic field sensor. This study investigates a magnetic surface acoustic wave (MSAW) sensor in a reflective delay line configuration with two acoustic propagation paths with and without magnetic field sensitive layer. The delay in path with sensitive layer leads to magnetic field detection and the one without enables temperature measurement and thus compensation for the first path. The developed sensor is based on a ZnO/LiNbO3 Y-cut (X-direction) layered structure as Love wave platform. Love wave as a shear wave being more favorable for magnetic detection. Co-Fe-B is considered as sensitive layer to detect magnetic field changes and is deposited on the top of ZnO, but only on one of the two paths. We combined an original configuration of connected IDTs with a high electromechanical coupling coefficient (K-2) mode to improve the signal amplitude. The achieved sensor exhibits a high temperature and magnetic field sensitivity of -63 ppm/degree celsius and -781 ppm/mT, respectively. The temperature compensation method for magnetic field measurement is demonstrated using a differential measurement by subtracting the delay times obtained for the two paths with and without the sensitive layer. Finally, the sensor exhibited good repeatability at various temperatures. Moreover, the device developed allows in addition to the multisensor functionality, the radio frequency identification (RFID) which is necessary for the deployment of sensor networks.

引用

页码：528 / 535

页数：8

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