A SAW resonator sensor system employed in humidity measurements

被引：0

作者：

Braga, ER ^{[1
]}

Nakano, AY ^{[1
]}

da Cunha, MP ^{[1
]}

机构：

[1] Univ Sao Paulo, Dept Elect Engn, BR-05508900 Sao Paulo, Brazil

来源：

1999 SBMO/IEEE MTT-S INTERNATIONAL MICROWAVE AND OPTOELECTRONICS CONFERENCE, PROCEEDINGS, VOLS 1 & 2: WIRELESS AND PHOTONICS BUILDING THE GLOBAL INFOWAYS | 1999年

关键词：

SAW resonator sensor system; cellulose acetate film; Sensibility; humidity detector;

D O I：

暂无

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：

The present paper describes a sensor system based on Surface Acoustic Wave (SAW) resonators, used both as the frequency control component and the sensor device. The system makes use of two 303 MHz oscillators, specifically designed by the authors for this application, thus accounting for the proper gain in the feedback path. The oscillators are frequency controlled by two identical SAW resonators, one sealed and used as a reference, whereas the of her had its surface coated with a cellulose acetate film, thus allowing the system to operate as a humidity detector. Although the system has been tested to sense humidity, it can be easily adapted to detect other gaseous materials, provided an adequate film is deposited on the SAW device. The sensor system built is described and the achieved performance of the humidity detector is presented.

引用

页码：342 / 345

页数：4