摘要
为解决传统气体传感器需高温加热才能实现气体检测的问题,设计了一种基于螺旋结构的微波传感器,谐振器能在2.8 GHz谐振频率下产生独立传输零点,实现常温下对目标气体的检测。通过静电纺丝和高温煅烧工艺制备了SnO_(2)/Co_(3)O_(4)复合纤维,并与谐振器组合形成了新型微波气体传感器。该传感器采用N-P复合异质结,实现了对20×10^(-6)~120×10^(-6)体积分数范围内丙酮的高精度测量,具有操作简便、低成本和小型化等优势。实验结果显示,在室温下,SnO_(2)/Co_(3)O_(4)复合纤维对体积分数为120×10^(-6)丙酮的响应表现为回波损耗变化,灵敏度为32.8×10^(3) dB。该研究为工业和实验室中低浓度、高精度气体检测提供了新方案。
To address the issue that traditional gas sensors require high-temperature heating for gas detection,a microwave sensor based on a helical structure is designed.This resonator can generate an independent transmission zero at a resonant frequency of 2.8 GHz,enabling the detection of target gases at room temperature.SnO_(2)/Co_(3)O_(4) composite fibers are prepared via electrospinning and high-temperature calcination processes,and then integrated with the resonator to synthesize a novel microwave gas sensor.The sensor employs an N-P composite heterojunction,enabling high-precision detection of acetone within a volume concentration of 20×10^(-6) to 120×10^(-6).It offers advantages of simple operation,low cost,and miniaturization.Experimental results demonstrate that at room temperature,the SnO_(2)/Co_(3)O_(4) composite fibers exhibit a response to volume concentration of 120×10^(-6) acetone through variations in return loss,achieving a sensitivity of 32.8×10^(3) dB.This study provides a new solution for low-concentration,high-precision gas detection in industrial and laboratory applications.
作者
周腾龙
吴滨
秦晟栋
吴蓓
梁峻阁
ZHOU Tenglong;WU Bin;QIN Shengdong;WU Bei;LIANG Junge(School of Integrated Circuits,Jiangnan University,Wuxi 214401,China;Wuxi Hengtong Electronic Devices Co.,Ltd.,Wuxi 214121,China)
出处
《电子与封装》
2025年第8期18-23,共6页
Electronics & Packaging
基金
国家重点研发计划(2021YFA1401103)
2022无锡太湖人才计划:创新领军人才团队(1096010241230120)。
关键词
气体传感器
复合异质结
微波检测
丙酮
gas sensor
composite heterojunction
microwave detection
acetone
