Details

Autor(en) / Beteiligte

• Lee, Hee-Jo
• Kim, Sangkil
• Hong, Young-Pyo

Titel

On the Optimal Modes for Glucose Droplet Sensing Based on Multi-Modes

Ist Teil von

• IEEE sensors journal, 2021-11, Vol.21 (21), p.24048-24055

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2021

Quelle

IEEE Xplore

Beschreibungen/Notizen

• In this paper, we demonstrate the optimal multi-modes for glucose droplet (GD) sensing depending on sample (glucose droplet) positions in a half-wavelength (<inline-formula> <tex-math notation="LaTeX">\lambda </tex-math></inline-formula>/2) microstrip resonator. Using two different GD positions, i.e., an edge and a center position, in the resonator, the resonant behavior of microwave multi-modes for GD sensing was investigated. GDs with three different concentrations, i.e., 0.1, 0.2, and 0.3 g/ml, were tested in the present experiment. With increasing GD concentration, the <inline-formula> <tex-math notation="LaTeX">{S}_{21} </tex-math></inline-formula>-level of the edge-positional GD gradually was declined at all resonant modes. For a center-positional GD, the frequency not only was deviated into the high-frequency region, but its <inline-formula> <tex-math notation="LaTeX">{S}_{21} </tex-math></inline-formula>-level also gradually was declined for the second and fourth modes. Based on the experimental results, the resonant behavior indicated the edge-(center-) positional GD had the resolution (~0.01/gmL −1 or ~0.05 dB/gmL −1 ) at the second (second) and third (fourth) modes, respectively. Furthermore, we showed that the edge-positional GD sensing is more suitable when the resonator is associated with an active circuit system, and simultaneous sensing is also possible for different positions in multi-modes.