THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Apr.; 29(4), 247 255. http://dx.doi.org/10.5515/kjkiees.2018.29.4.247 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Complementary Split Ring Resonator(CSRR) Noninvasive Method to Distinguish between Glucose and Sodium Chloride Solution Using Complementary Split-Ring Resonator 장초롬 박진관 윤기호 육종관 Chorom Jang Jin-Kwan Park Gi-Ho Yun* Jong-Gwan Yook 요약 complementary split ring resonator(csrr). CSRR,. PDMS mold,. 400 mg/dl 100 mg/dl, 50 μl. (S 21 ), 100 mg/dl -0.06 db, 0.14 db, S 21. Abstract In this work, glucose solution and sodium chloride solution were distinguished noninvasively using a microwave complementary split-ring resonator (CSRR). Based on the electrical properties of the two solutions measured using a open-ended coaxial probe, a CSRR was designed and fabricated for operation at a specific frequency that facilitates differentiating the two solutions. Furthermore, a polydimethylsiloxane mold was fabricated to concentrate the solution at a region where the electric field of the resonator was strongest, and a laminating film was used to prevent contact between the solution and resonator. Experiments were performed by dropping 50 μl of the solution in steps of 100 mg/dl up to a maximum human blood glucose level of 400 mg/dl. Our experiments confirmed that the transmission coefficients (S 21 ) of glucose solution and sodium chloride solution exhibit variations of 0.06 db and 0.14 db, respectively, per 100 mg/dl concentration change at the resonance frequency. Thus, the opposite trends in the variation of S 21 with change in the concentration of the two solutions can be used to distinguish between them. Key words: Complimentary Split Ring Resonator, Glucose, Sodium Chloride, Non-Invasive, Discrimination, Microwave Sensor. 서론, 2015 40 2017 ( ) (NRF-2017R1A2B2011724) (Department of Electrical and Electronic Engineering, Yonsei University) * (Department of Information and Communication Engineering, Sungkyul University) Manuscript received February 20, 2018 ; Revised March 28, 2018 ; Accepted April 11, 2018. (ID No. 20180220-002S) Corresponding Author: Jong-Gwan Yook (e-mail: jgyook@yonsei.ac.kr) c Copyright The Korean Institute of Electromagnetic Engineering and Science. All Rights Reserved. 247
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 4, Apr. 2018., 2045 70 [1].,,, [2]., [3]., 2 [4]., [5]. [6] [8].,....,. [9], [10], [11] [13], [14],[15], [16] [18], [19] [21], [22],[23]. 45 % 55 %,,,,. 90 mg/dl 140 mg/dl, 310 mg/dl 370 mg/dl, 400 mg/dl [24]. 0 mg/dl 400 mg/dl 5 (0, 100, 200, 300, 400 mg/dl).. 혈당센서설계 2-1 수용액의전기적특성측정, 1 (85070D) (E8364A). 500 MHz 15 GHz, 400 mg/dl 100 mg/dl.. 2.., (1) ( (2)) 3. (1) 그림 1. Fig. 1. The measurement setup of solution. 248
Complementary Split Ring Resonator(CSRR) (a) (a) Glucose solution (a) (a) Glucose solution (b) (b) Sodium chloride solution 그림 2. Fig. 2. Measured dielectric constant. (b) (b) Sodium chloride solution 그림 3. Fig. 3. Measured loss tangent. tan (2) 3. 500 MHz 3 GHz. 2.5 3 GHz. 2-2 공진기및환경설계 4. complementary split ring resonator (CSRR) PDMS mold, 그림 4. Fig. 4. The proposed glucose sensor system. 249
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 4, Apr. 2018.. (nearfield),, (reflection coefficient, S 11 ), (transmission coefficient, S 21 ).. CSRR split ring, (band stop filter). CSRR [25],[26]. 5 CSRR., split ring,,, split ring,,., CSRR (3) split ring, split ring [27]. nh pf. (a) (a) Top view (b) (b) Bottom view (c) split ring (c) Enlarged split ring (3) 2.17, 0.0008, 0.8 mm CSRR FDTD 6, (d) (d) Electric field distribution 그림 5. CSRR Fig. 5. Equivalent circuit of CSRR. (e) (S 21 ) (e) Transmission coefficient(s 21 ) 그림 6. CSRR Fig. 6. Structure of designed CSRR. 250
Complementary Split Ring Resonator(CSRR) 표 1. CSRR Table 1. Dimensions of the designed CSRR. Parameter a b c d e f g Value [mm] 26 40 0.39 0.38 0.22 7 0.22 1. (f), (c, d, e, g). CSRR 6 split ring, 2.8 GHz -26 db S 21. PDMS polydimethylsiloxane, 2.6, 0.001 [28]. PDMS mold. 3D. 10:1,. 100 45.. PDMS mold 50 μl 2.5 mm 3.2 mm 0.1 mm S 21 7. (4) PDMS 400 mg/dl S 21 (0 mg/dl) S 21. 3 mm S 21. 그림 7. PDMS mold (S 21 ) Fig. 7. Variation of transmission coefficient(s 21 ) versus the change of the radius of PDMS mold.. 8. (5) S 21 0 mg/dl S 21. (5) 8 S 21. 9 (4). 시뮬레이션및측정결과 S 21. 그림 8. (S 21 ) Fig. 8. Simulation result of variation of transmission coefficient(s 21 ) versus the change of concentration of solution. 251
THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 4, Apr. 2018. 그림 9. (Z in ) Fig. 9. Variation of input impedance(z in ) of resonator versus the change of concentration of solution. (Z in ). 9 Z in 50 Ω S 11 S 21. Z in 50 Ω. 50 μl PDMS mold (E5071B) S 21. 10. S 21. 400 mg/dl NaCl S 21-0.28 db, 0.42 db., -0.23 db, 0.46 db S 21., PDMS mold.. 결론. CSRR PDMS mold, FDTD. (0, 100, 200, 300, 400 mg/dl) 50 μl PDMS mold., S 21. References 그림 10. (S 21 ) Fig. 10. Simulation and experimental result of variation of transmission coefficient(s 21 ) versus the change of concentration of solution. [1] International Diabetes Federation, "IDF figures." Available: http://www.diabetesatlas.org/key-messages.html, Accessed on: Feb. 6, 2018. [2] International Diabetes Federation, "New IDF figures show continued increase in diabetes across the globe, reiterating the need for urgent action." Available: https://www. idf.org/news/94:new-idf-figures-show-continued-increase-indiabetes-across-the-globe,-reiterating-the-need-for-urgentaction.html, Accessed on: Feb. 6, 2018. 252
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