Microwave sensors:: a new sensing principle.: Application to humidity detection

被引：58

作者：

Bernou, C ^{[1
]}

Rebière, D ^{[1
]}

Pistrè, J ^{[1
]}

机构：

[1] Univ Bordeaux 1, Lab IXL, UMR 5818 CNRS, F-33405 Talence, France

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2000年 / 68卷 / 1-3期

关键词：

gas sensor; microwave; planar resonator; thick film technology; humidity sensor;

D O I：

10.1016/S0925-4005(00)00466-4

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We are presenting here a new approach to gas sensor, using the electromagnetic (e.m) properties variation of some sensitive materials in the presence of gas at ultrahigh frequencies (ca. 1 GHz). The chemical sensor basically consists of a microwave resonator to which a sensitive coating is added. The e.m perturbation can be seen through a frequency variation measurement when the sensor serves as feedback element in an oscillator chain. After the development of a narrow-band-pass filter, a permittivity variation study is done, thanks to an e.m simulator HP-MDS. Then a humidity sensor is designed and rested. A good sensitivity as well as a great reversibility are obtained. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：88 / 93

页数：6

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