Name
Abstract | ||
|---|---|---|
In this work, we propose a metamaterial absorber at microwave frequencies with significant sensitivity and non-destructive sensing capability for grain samples. This absorber is composed of cross-resonators periodically arranged on an ultrathin substrate, a sensing layer filled with grain samples, and a metal ground. The cross-resonator array is fabricated using the printed circuit board process on an FR-4 board. The performance of the proposed metamaterial is demonstrated with both full-wave simulation and measurement results, and the working mechanism is revealed through multi-reflection interference theory. It can serve as a non-contact sensor for food quality control such as adulteration, variety, etc. by detecting shifts in the resonant frequencies. As a direct application, it is shown that the resonant frequency displays a significant blue shift from 7.11 GHz to 7.52 GHz when the mass fraction of stale rice in the mixture of fresh and stale rice is changed from 0% to 100%. In addition, the absorber shows a distinct difference in the resonant absorption frequency for different varieties of grain, which also makes it a candidate for a grain classification sensor. The presented scheme could open up opportunities for microwave metamaterial absorbers to be applied as efficient sensors in the non-destructive evaluation of agricultural and food product quality. |
Year | DOI | Venue |
|---|---|---|
2018 | 10.3390/s18061912 | SENSORS |
Keywords | Field | DocType |
metamaterial absorber,resonant frequency,sensing,effective permittivity,grain,non-destructive evaluation | Microwave,Sensing applications,Electronic engineering,Engineering,Metamaterial absorber,Optoelectronics | Journal |
Volume | Issue | Citations |
18 | 6.0 | 0 |
PageRank | References | Authors |
0.34 | 7 | 4 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yin Zhang | 1 | 0 | 0.34 |
| JunMing Zhao | 2 | 19 | 1.52 |
| Jie Cao | 3 | 627 | 73.36 |
| Bo Mao | 4 | 163 | 19.27 |