Browsing by Author "Markvart, A."
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Item Metamaterials-inspired resonator for wireless power transfer systems(2018-01-01) Markvart, A.; Song, M.; Kosulnikov, S.; Glybovski, S.; Belov, P.; Simovski, C.; Kapitanova, P.; Department of Electronics and Nanoengineering; Kostantin Simovski Group; St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO)Metamaterial-inspired resonator for a wireless power transfer system is proposed and studied numerically. The resonator consists of two orthogonal wire layers separated by a short distance. To reduce the resonant frequency from several hundreds of MHz it is placed in a background dielectric material with high permittivity. By tuning the permittivity of the background material, the radiation losses can be significantly reduced resulting in a high Q-factor of 900. The wireless power transfer efficiency greater than 80% from the wire resonator to a small loop receiver has been numerically demonstrated at the frequency of 19 MHz. The large area of the proposed resonator (50 cm 50 cm) offers a possibility to charge multiple receivers simultaneously.Item Parametric study of metamaterial-inspired resonator for wireless power transfer(IOP Publishing Ltd., 2020-04-23) Markvart, A.; Song, M.; Belov, P.; Simovski, Konstantin; Kapitanova, P.; Department of Electronics and Nanoengineering; Kostantin Simovski Group; St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO)A metamaterial-inspired resonator for free-positioning wireless charging of several devices is proposed and numerically studied. The resonator is based on orthogonal metallic wires arrays deposited on a high permittivity low loss dielectric substrate. Given a fixed area of 50 × 50 cm, its resonant frequency can be tuned in a wide frequency band from 5 MHz to 45 MHz. A parametric study is performed to reveal the influence of resonant frequency, dielectric permittivity and number of wires on Q-factor.