SAW GAS SENSORS - COMPARISON BETWEEN DELAY-LINE AND 2-PORT-RESONATOR

被引：29
|
作者：
MAUDER, A
机构：
[1] Technische Universität München, Munich, D-80333
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 1995年 / 26卷 / 1-3期
关键词：
SURFACE ACOUSTIC WAVE OSCILLATORS; FREQUENCY DISCRIMINATORS; NOISE EQUIVALENT GAS CONCENTRATION;
D O I：
10.1016/0925-4005(94)01583-4
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
This paper aims at determining the factors of influence on the frequency noise of surface acoustic wave (SAW) oscillators in gas sensor applications. Frequency discriminant devices are SAW two port resonators acid SAW delay lines provided with a gas sensitive coating. The frequency noise determines a lower limit for the mass resolution and thus the noise equivalent gas concentration (NEC) of the sensor. The model used is the single sideband phase noise of the oscillator considering the influence of the coating on the attenuation and group delay of the SAW device. From this the SAW device best suited for a given application is ascertained.
引用
收藏
页码：187 / 190
页数：4
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