Abstract
In this paper, hybrid integration of planar microstrip line and Photonic Band Gap (PBG) structure is proposed for the dielectric characterization of liquids. To implement the PBG structure of the microstrip line, a microfluidic channel with periodic form is introduced into the substrate and filled with different liquids. Based on this configuration, the operation principle of the sensor is based on a frequency shift due to the variation in the center of the bandgap, which in turn changes with the variation of the permittivity of LUT filled in the microfluidic channel. The proposed sensor exploits the behavior of the bandgap as a reflector to construct a resonant structure sensitive to the variation in LUT permittivity. The dimensions of the planar structure are optimized to achieve high precision and discrimination capability. The different empirical expressions describing the complex permittivity with the measured parameters were carried out. To validate the proposed concept, the sensor prototype is designed, fabricated, and tested. The frequency shift related to a change of 3.2 in LUT permittivity corresponds to 180 MHz around 6 GHz. The resonant-mode sensor spans a permittivity range from 1 to 80 with a precision better than 7.2%. The proposed sensor is simple in design and low cost, which may be applied in different applications at the industrial.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
References
[1] N. Tiwari, S. Singh, D. Mondal, and M. Akhtar, “Flexible biomedical RF sensors to quantify the purity of medical grade glycerol and glucose concentrations,” International Journal of Microwave and Wireless Technologies, vol. 12, no. 2, pp. 120–130, 2020, https://doi.org/10.1017/s1759078719001089.Search in Google Scholar
[2] P. Vélez, J. Munoz-Enano, A. Ebrahimi, et al.., “Single-frequency amplitude-modulation sensor for dielectric characterization of solids and microfluidics,” IEEE Sensor. J., vol. 21, no. 10, pp. 12189–12201, 2021.10.1109/JSEN.2021.3062290Search in Google Scholar
[3] M. Abdolrazzaghi, M. Daneshmand, and A. K. Iyer, “Strongly enhanced sensitivity in planar microwave sensors based on metamaterial coupling,” IEEE Trans. Microw. Theor. Tech., vol. 66, no. 4, pp. 1843–1855, 2018, https://doi.org/10.1109/tmtt.2018.2791942.Search in Google Scholar
[4] J. Basseri and M. Joodaki, “Realization of a low-cost displacement sensor on PCB with two-metal-layer coplanar waveguide loaded by an EBG structure,” IEEE Sensor. J., vol. 17, no. 15, pp. 4797–4804, 2017, https://doi.org/10.1109/jsen.2017.2714642.Search in Google Scholar
[5] G. Gennarelli, S. Romeo, M. R. Scarfì, and F. Soldovieri, “A microwave resonant sensor for concentration measurements of liquid solutions,” IEEE Sensor. J., vol. 13, no. 5, pp. 1857–1864, 2013, https://doi.org/10.1109/jsen.2013.2244035.Search in Google Scholar
[6] S. Y. Huang, Omkar, Y. Yoshida, et al., “Microstrip line-based glucose sensor for noninvasive continuous monitoring using the main field for sensing and multivariable crosschecking,” IEEE Sensor. J., vol. 19, no. 2, pp. 535–547, 2019, https://doi.org/10.1109/jsen.2018.2877691.Search in Google Scholar
[7] S. Julrat, S. Trabelsi, and S. O. Nelson, “Open-ended half-mode substrate-integrated waveguide sensor for complex permittivity measurement,” IEEE Sensor. J., vol. 18, no. 7, pp. 2759–2767, 2018, https://doi.org/10.1109/jsen.2018.2801316.Search in Google Scholar
[8] M. S. Boybay and O. M. Ramahi, “Material characterization using complementary split-ring resonators,” IEEE Trans. Instrum. Meas., vol. 61, no. 11, pp. 3039–3046, 2012, https://doi.org/10.1109/tim.2012.2203450.Search in Google Scholar
[9] K. Saeed, A. C. Guyette, I. C. Hunter, and R. D. Pollard, Microstrip Resonator Technique For Measuring Dielectric Permittivity Of Liquid Solvents And for Solution Sensing, Honolulu, HI, 2007 IEEE/MTT-S International Microwave Symposium, 2007, pp. 1185–1188.10.1109/MWSYM.2007.380342Search in Google Scholar
[10] A. A. Abduljabar, D. J. Rowe, A. Porch, and D. A. Barrow, “Novel microwave microfluidic sensor using a microstrip split-ring resonator,” IEEE Trans. Microw. Theor. Tech., vol. 62, no. 3, pp. 679–688, 2014, https://doi.org/10.1109/tmtt.2014.2300066.Search in Google Scholar
[11] C. Lee and C. Yang, “Complementary split-ring resonators for measuring dielectric constants and loss tangents,” IEEE Microw. Wireless Compon. Lett., vol. 24, no. 8, pp. 563–565, 2014, https://doi.org/10.1109/lmwc.2014.2318900.Search in Google Scholar
[12] G. Galindo-Romera, F. Javier Herraiz-Martínez, M. Gil, J. J. Martínez, and D. Segovia-Vargas, “Submersible printed split-ring resonator-based sensor for thin-film detection and permittivity characterization,” IEEE Sensor. J., vol. 16, no. 10, pp. 3587–3596, 2016, https://doi.org/10.1109/jsen.2016.2538086.Search in Google Scholar
[13] L. Benkhaoua, M. T. Benhabiles, S. Mouissat, and M. L. Riabi, “Miniaturized quasi-lumped resonator for dielectric characterization of liquid mixtures,” IEEE Sensor. J., vol. 16, no. 6, 2016, pp. 1603–1610, https://doi.org/10.1109/jsen.2015.2504601.Search in Google Scholar
[14] P. Vélez, L. Su, K. Grenier, J. Mata-Contreras, D. Dubuc, and F. Martín, “Microwave microfluidic sensor based on a microstrip splitter/combiner configuration and split ring resonators (SRRs) for dielectric characterization of liquids,” IEEE Sensor. J., vol. 17, no. 20, pp. 6589–6598, 2017.10.1109/JSEN.2017.2747764Search in Google Scholar
[15] J. D. Joannopoulos, R. D. Meade, and J. N. Winn, Photonic Crystals: Molding The Flow Of Light, Princeton, NJ, Princeton University Press, 1995.Search in Google Scholar
[16] Y. Qian, V. Radisic, and T. Itoh, “Simulation and experiment of photonic band-gap structures for microstrip circuits,” Proceedings of 1997 Asia-Pacific Microwave Conference, Hong Kong, vol. 2, pp. 585–588, 1997.10.1109/APMC.1997.654609Search in Google Scholar
[17] V. Radisic, Y. Qian, R. Coccioli, and T. Itoh, “Novel 2-D photonic bandgap structure for microstrip lines,” IEEE Microw. Guid. Wave Lett., vol. 8, no. 2, pp. 69–71, 1998, https://doi.org/10.1109/75.658644.Search in Google Scholar
[18] D. Maystre, “Electromagnetic study of photonic band gaps,” Pure Appl. Opt, vol. 3, pp. 975–993, 1994, https://doi.org/10.1088/0963-9659/3/6/005.Search in Google Scholar
[19] J. Trull, C. Cojocaru, J. Massaneda, R. Vilaseca, and J. Martorell, “Determination of refractive indices of quarter-wavelength Bragg reflectors by reflectance measurements in wavelength and angular domains,” Appl. Opt., vol. 41, no. 24, pp. 5172–5178, 2002, https://doi.org/10.1364/ao.41.005172.Search in Google Scholar PubMed
[20] V. L. Bratman, G. G. Denisov, N. S. Ginzburg, and M. I. Petelin, “FEL’s with Bragg reflection resonators: cyclotron autoresonance masers versus ubitrons,” IEEE J. Quant. Electron., vols QE-19, no. 3, pp. 282–296, 1983, https://doi.org/10.1109/jqe.1983.1071840.Search in Google Scholar
[21] J.-Z. Bao, M. L. Swicord, and C. C. Davis, “Microwave dielectric characterization of binary mixtures of water, methanol, and ethanol,” J. Chem. Phys., vol. 104, p. 4441, 1996, https://doi.org/10.1063/1.471197.Search in Google Scholar
[22] S. Y. Jun, B. Sanz Izquierdo, and E. A. Parker, “Liquid sensor/detector using an EBG structure,” IEEE Trans. Antenn. Propag., vol. 67, no. 5, pp. 3366–3373, 2019, https://doi.org/10.1109/tap.2019.2902663.Search in Google Scholar
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