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Sensors 2018, 18(11), 3850; https://doi.org/10.3390/s18113850 (registering DOI)

Temperature-Corrected Fluidic Glucose Sensor Based on Microwave Resonator

1
Department of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Korea
2
Department of Physics Education, College of Education, Daegu University, Gyeongsan 38453, Korea
3
Department of Information and Communications Engineering, Sungkyul University, Gyeonggi-Do 14097, Korea
*
Author to whom correspondence should be addressed.
Received: 5 October 2018 / Revised: 30 October 2018 / Accepted: 7 November 2018 / Published: 9 November 2018
(This article belongs to the Special Issue RF Technology for Sensor Applications)
Full-Text   |   PDF [876 KB, uploaded 9 November 2018]   |  

Abstract

In this paper, a fluidic glucose sensor that is based on a complementary split-ring resonator (CSRR) is proposed for the microwave frequency region. The detection of glucose with different concentrations from 0 mg/dL to 400 mg/dL in a non-invasive manner is possible by introducing a fluidic system. The glucose concentration can be continuously monitored by tracking the transmission coefficient S 21 as a sensing parameter. The variation tendency in S 21 by the glucose concentration is analyzed with equivalent circuit model. In addition, to eradicate the systematic error due to temperature variation, the sensor is tested in two temperature conditions: the constant temperature condition and the time-dependent varying temperature condition. For the varying temperature condition, the temperature correction function was derived between the temperature and the variation in S 21 for DI water. By applying the fitting function to glucose solution, the subsidiary results due to temperature can be completely eliminated. As a result, the S 21 varies by 0.03 dB as the glucose concentration increases from 0 mg/dL to 400 mg/dL. View Full-Text
Keywords: fluidic glucose sensor; complementary split-ring resonator; non-invasive detection; microwave; temperature correction; electromagnetic biosensor fluidic glucose sensor; complementary split-ring resonator; non-invasive detection; microwave; temperature correction; electromagnetic biosensor
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Jang, C.; Park, J.-K.; Lee, H.-J.; Yun, G.-H.; Yook, J.-G. Temperature-Corrected Fluidic Glucose Sensor Based on Microwave Resonator. Sensors 2018, 18, 3850.

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