Microwave Detection of Carbon Monoxide Gas via a Spoof Localized Surface Plasmons-Enhanced Cavity Antenna
This paper presents a carbon monoxide (CO) detection mechanism achieved through further improvement of the sensing antenna based on hybrid spoof localized surface plasmons (SLSPs) and cavity resonance. Unlike conventional approaches relying on chemical reactions or photoelectric effects, the all-met...
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MDPI AG
2025-07-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/16/7/790 |
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| author | Meng Wang Wenjie Xu Shitao Sun |
| author_facet | Meng Wang Wenjie Xu Shitao Sun |
| author_sort | Meng Wang |
| collection | DOAJ |
| description | This paper presents a carbon monoxide (CO) detection mechanism achieved through further improvement of the sensing antenna based on hybrid spoof localized surface plasmons (SLSPs) and cavity resonance. Unlike conventional approaches relying on chemical reactions or photoelectric effects, the all-metal configuration detects dielectric variations through microwave-regime resonance frequency shifts, enabling CO/air differentiation with theoretically enhanced robustness and environmental adaptability. The designed system achieves measured figures of merit (FoMs) of 183.2 RIU<sup>−1</sup>, resolving gases with dielectric contrast below 0.1%. Experimental validation successfully discriminated CO (ε<sub>r</sub> = 1.00262) from air (ε<sub>r</sub> = 1.00054) under standard atmospheric pressure at 18 °C. |
| format | Article |
| id | doaj-art-e5a6a7ef99874c03ae8322eae1ff14ee |
| institution | DOAJ |
| issn | 2072-666X |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj-art-e5a6a7ef99874c03ae8322eae1ff14ee2025-08-20T02:47:07ZengMDPI AGMicromachines2072-666X2025-07-0116779010.3390/mi16070790Microwave Detection of Carbon Monoxide Gas via a Spoof Localized Surface Plasmons-Enhanced Cavity AntennaMeng Wang0Wenjie Xu1Shitao Sun2Wuxi Campus, Southeast University, Wuxi 214127, ChinaWuxi Campus, Southeast University, Wuxi 214127, ChinaWuxi Campus, Southeast University, Wuxi 214127, ChinaThis paper presents a carbon monoxide (CO) detection mechanism achieved through further improvement of the sensing antenna based on hybrid spoof localized surface plasmons (SLSPs) and cavity resonance. Unlike conventional approaches relying on chemical reactions or photoelectric effects, the all-metal configuration detects dielectric variations through microwave-regime resonance frequency shifts, enabling CO/air differentiation with theoretically enhanced robustness and environmental adaptability. The designed system achieves measured figures of merit (FoMs) of 183.2 RIU<sup>−1</sup>, resolving gases with dielectric contrast below 0.1%. Experimental validation successfully discriminated CO (ε<sub>r</sub> = 1.00262) from air (ε<sub>r</sub> = 1.00054) under standard atmospheric pressure at 18 °C.https://www.mdpi.com/2072-666X/16/7/790cavity resonancecarbon monoxide discriminationremote detectionsensing antennaspoof localized surface plasmons |
| spellingShingle | Meng Wang Wenjie Xu Shitao Sun Microwave Detection of Carbon Monoxide Gas via a Spoof Localized Surface Plasmons-Enhanced Cavity Antenna Micromachines cavity resonance carbon monoxide discrimination remote detection sensing antenna spoof localized surface plasmons |
| title | Microwave Detection of Carbon Monoxide Gas via a Spoof Localized Surface Plasmons-Enhanced Cavity Antenna |
| title_full | Microwave Detection of Carbon Monoxide Gas via a Spoof Localized Surface Plasmons-Enhanced Cavity Antenna |
| title_fullStr | Microwave Detection of Carbon Monoxide Gas via a Spoof Localized Surface Plasmons-Enhanced Cavity Antenna |
| title_full_unstemmed | Microwave Detection of Carbon Monoxide Gas via a Spoof Localized Surface Plasmons-Enhanced Cavity Antenna |
| title_short | Microwave Detection of Carbon Monoxide Gas via a Spoof Localized Surface Plasmons-Enhanced Cavity Antenna |
| title_sort | microwave detection of carbon monoxide gas via a spoof localized surface plasmons enhanced cavity antenna |
| topic | cavity resonance carbon monoxide discrimination remote detection sensing antenna spoof localized surface plasmons |
| url | https://www.mdpi.com/2072-666X/16/7/790 |
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