Vol. 176
2023-03-01
Designing Highly Sensitive Microwave Antenna Sensor with Novel Model for Noninvasive Glucose Measurements
By
Progress In Electromagnetics Research, Vol. 176, 129-141, 2023
Abstract
The concentration induced permittivity change involves a dispersion which occurs at the resonant frequency, and is often not predictable by simulation using the traditional Cole-Cole model. To overcome this problem, a new Lorentz's model is proposed as a substitute for the Cole-Cole model. Under this new model, the glucose concentration is expected to be measured at the contact interface in the form of a resonant frequency shift. With the help of the model, a contact-based meander-line antenna sensor (CMS) is realized with a high ``sensitivity of 1.3158 dB/(mmol/L) in terms of d |S11|/dC, or of 17~18 MHz/(mmol/L) in terms of'' dω/dC. The model has been experimentally validated with in-vitro measurements and for proof-of-concept with in-vivo clinical investigations in the microwave frequency. Consistent with the predictions of model, a linear ``correlation is observed not only between the resonant frequency shift and the glucose concentration, but also between the S-parameters magnitude and glucose'' concentration.
Citation
Abhishek Kandwal Louis W. Y. Liu Jingzhen Li Yuhang Liu Huajie Tang Ziheng Ju Tobore Igbe Rohit Jasrotia Zedong Nie , "Designing Highly Sensitive Microwave Antenna Sensor with Novel Model for Noninvasive Glucose Measurements," Progress In Electromagnetics Research, Vol. 176, 129-141, 2023.
doi:10.2528/PIER22113002
http://www.jpier.org/PIER/pier.php?paper=22113002
References