Humidity and Temperature Dual Flexible Microwave Sensor

被引：3

作者：

Ngoune, Bernard Bobby ^{[1
]}

Hallil, Hamida ^{[1
]}

Bila, Stephane ^{[2
]}

Baillargeat, Dominique ^{[2
]}

Bondu, Benoit ^{[3
]}

Cloutet, Eric ^{[4
]}

Dejous, Corinne ^{[1
]}

机构：

[1] Univ Bordeaux, Bordeaux INP, CNRS, IMS,UMR 5218, F-33400 Talence, France

[2] Univ Limoges, CNRS, XLIM UMR 7252, F-87060 Limoges, France

[3] ISORG, Pessac, France

[4] Univ Bordeaux, LCPO, UMR 5629, ENSCBP,IPB, Pessac, France

来源：

2022 29TH IEEE INTERNATIONAL CONFERENCE ON ELECTRONICS, CIRCUITS AND SYSTEMS (IEEE ICECS 2022) | 2022年

关键词：

Dual microwave sensor; Humidity; Temperature; Polymer sensitive material; passive resonator;

D O I：

10.1109/ICECS202256217.2022.9971127

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 dual flexible microwave sensor is presented for humidity and temperature sensing. The sensor consists of two microstrip interdigitated resonators printed on a flexible Kapton substrate. One resonator is coated with polyethyleneimine silane 1:0.5 and the other is left uncoated. The coated resonator at 3.26 GHz showed a good sensitivity of 0.45 MHz/%RH and -0.01 dB/%RH in a range of 35 - 85 % RH, with low hysteresis (<5%), and -0.192 MHz/degrees C and 0.01 dB/degrees C in a range of 30 - 45 degrees C. On the other hand, the uncoated resonator showed a linear response and high hysteresis (> 30%) with a low sensitivity of -0.045 MHz/%RH and similar to 0 dB/%RH under humidity. It showed a temperature sensitivity of 0.07 MHz/degrees C and 0.01 dB/degrees C. RH sensitivity does not vary with temperature for both the coated and uncoated resonators. The uncoated resonator showed a distinct RH-independent temperature sensitivity in magnitude which makes it easier to decorrelate variations of both parameters.

引用

页数：4

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