Complex effective dielectric permittivity and characteristic impedance of tunable coplanar line
DOI:
https://doi.org/10.3103/S0735272720060011Keywords:
coplanar line, effective dielectric permittivity, characteristic impedance, micromechanically tuning, losses in dielectric, losses in metalAbstract
An analysis of complex dielectric permittivity and characteristic impedance of micromechanically tunable coplanar line is presented. The coplanar line parameters tuning is achieved by signal line electrode movement above the substrate or the dielectric plate above the surface of line electrodes. A reconfiguration of electromagnetic field with complex nature occurs as a result of such movement in the line. It is described in terms of effective permittivity and characteristic impedance. We studied an influence of physical and geometrical parameters of the line on characteristics of effective permittivity tuning and change in characteristic impedance and line loss. It is found that proposed method for line tuning parameters allows us to obtain a high sensitivity to movement for effective parameters, wherein the level of losses in the line is not deteriorated, and under certain conditions are reduced. These results make it possible to design high-quality tunable resonant elements and phase shifters based on micromechanically controlled coplanar line.References
Y. Yamao, N. Akutsu, “SHF-band 3-bit reconfigurable BPF employing pHEMT switch arrays for 5G multiband operation,” in Proceedings of European Microwave Conference in Central Europe, EuMCE 2019, 2019, pp. 298–301, uri: https://ieeexplore.ieee.org/abstract/document/8874847.
J. Zhu, C. Jia, C. Wang, K. Li, “An adaptive spectrum allocation algorithm in ultra-dense network,” in 2018 10th International Conference on Communication Software and Networks, ICCSN 2018, 2018, pp. 433–437, doi: https://doi.org/10.1109/ICCSN.2018.8488267.
M. Kamran Khattak, S. Kahng, M. Salman Khattak, A. Rehman, C. Lee, D. Han, “Low profile, wideband and high gain beamsteering antenna for 5G mobile communication,” in 2017 IEEE Antennas and Propagation Society International Symposium, Proceedings, 2017, vol. 2017-Janua, pp. 2575–2576, doi: https://doi.org/10.1109/APUSNCURSINRSM.2017.8073330.
F. C. Chen, R. S. Li, J. P. Chen, “A tunable dual-band bandpass-to-bandstop filter using p-i-n diodes and varactors,” IEEE Access, vol. 6, pp. 46058–46065, 2018, doi: https://doi.org/10.1109/ACCESS.2018.2862887.
A. M. E. Safwat, F. Podevin, P. Ferrari, A. Vilcot, “Tunable bandstop defected ground structure resonator using reconfigurable dumbbell-shaped coplanar waveguide,” IEEE Trans. Microw. Theory Tech., vol. 54, no. 9, pp. 3559–3564, 2006, doi: https://doi.org/10.1109/TMTT.2006.880654.
A. K. Horestani, Z. Shaterian, J. Naqui, F. Martin, C. Fumeaux, “Reconfigurable and tunable S-shaped split-ring resonators and application in band-notched UWB antennas,” IEEE Trans. Antennas Propag., vol. 64, no. 9, pp. 3766–3776, 2016, doi: https://doi.org/10.1109/TAP.2016.2585183.
P. Jinde, S. M. Rathod, A. D. Chaudhari, A. Jeyakumar, “Optically controlled circular microstrip antenna using photoconductive switch,” in 2017 4th IEEE Uttar Pradesh Section International Conference on Electrical, Computer and Electronics, UPCON 2017, 2017, vol. 2018-Janua, pp. 340–344, doi: https://doi.org/10.1109/UPCON.2017.8251071.
H. V. Nguyen, A. Sharaiha, “Design of miniaturized and tunable antenna by integrating BST thin film varactor,” in International Conference on Advanced Technologies for Communications, 2018, vol. 2018-Octob, pp. 65–68, doi: https://doi.org/10.1109/ATC.2018.8587467.
A. F. Azarnaminy, R. Mansour, “A combline tunable filter with loss compensation circuit,” in IEEE MTT-S International Microwave Symposium Digest, 2018, vol. 2018-June, pp. 1367–1369, doi: https://doi.org/10.1109/MWSYM.2018.8439360.
D. Mercier et al., “X band distributed phase shifter based on sol-gel BCTZ varactors,” in European Microwave Week 2017: “A Prime Year for a Prime Event”, EuMW 2017 - Conference Proceedings; 47th European Microwave Conference, EuMC 2017, 2017, vol. 2017-Janua, pp. 1230–1233, doi: https://doi.org/10.23919/EuMC.2017.8231072.
A. S. Abdellatif et al., “Low loss, wideband, and compact cpw-based phase shifter for millimeter-wave applications,” IEEE Trans. Microw. Theory Tech., vol. 62, no. 12, pp. 3403–3413, 2014, doi: https://doi.org/10.1109/TMTT.2014.2365539.
Y. Poplavko et al., “Low loss microwave piezo-tunable devices,” in Proceedings of the 36th European Microwave Conference, EuMC 2006, 2006, pp. 657–660, doi: https://doi.org/10.1109/EUMC.2006.281496.
T. W. Lin, K. K. Wei Low, R. Gaddi, G. M. Rebeiz, “High-linearity 5.3-7.0 GHz 3-pole tunable bandpass filter using commercial RF MEMS capacitors,” in 2018 48th European Microwave Conference, EuMC 2018, 2018, pp. 555–558, doi: https://doi.org/10.23919/EuMC.2018.8541669.
R. Garg, I. Bahl, M. Bozzi, Microstrip Lines and Slotlines, 3rd ed. Norwood, MA: Artech House, Inc., 2013, doi: https://doi.org/10.1017/CBO9781107415324.004.
E. A. Tsyba, I. P. Golubeva, V. Kazmirenko, Y. V. Prokopenko, “Complex effective dielectric permittivity of micromechanically tunable microstrip lines,” Radioelectron. Commun. Syst., vol. 61, no. 2, pp. 72–79, 2018, doi: https://doi.org/10.3103/S0735272718020048.
A. S. Chernov, I. P. Golubeva, V. A. Kazmirenko, Y. V. Prokopenko, “Tunable coplanar waveguide,” Microsystems, Electron. Acoust., vol. 23, no. 6, pp. 13–21, 2018, doi: https://doi.org/10.20535/2523-4455.2018.23.6.154565.
A. Chernov, I. Golubeva, V. Kazmirenko, Y. Prokopenko, “Losses in the micromechanically tunable coplanar waveguide based line,” in 2020 IEEE 40th International Conference on Electronics and Nanotechnology, 2020, pp. 355–360, doi: https://doi.org/10.1109/elnano50318.2020.9088764.
Y. M. Poplavko, Physics of Dielectrics. Kiev: Vyssh. Shkola, 1980.
A. I. Akhiezer, I. A. Akhiezer, Electromagnetism and Electromagnetic Waves. Moscow: Vyssh. Shkola, 1985.
A. D. Grygoryev, Electrodynamics and Microwave Technology. Moscow: Vyssh. Shkola, 1990.
