Mu-negative metamaterials seen as band-limited non-foster impedances in inductive power transmission systems
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Journal of Microwaves, Optoelectronics and Electromagnetic Applications
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In the last decade, various works have demonstrated that a class of artificial material called metamaterials (MTM) can synthesize mu-negative (MNG) media capable of evanescent-wave focusing which largely enhances the magnetic coupling between coils, which is the basic mechanism of Inductive Power Transmission (IPT) systems. In the present work, MTM-enhanced coupling in IPT systems is examined through analytical and numerical results, which are validated by experimental data. Adopting a transmission-line (TL) based approach to describe the general MTM-enhanced IPT system, it is evidenced that MNG MTMs can be interpreted as a negative impedance from a circuital point of view.
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ALMEIDA, JORGE V. de; SIQUEIRA, GLAUCIO L.; MOSSO, MARBEY M.; SARTORI, CARLOS A.F. Mu-negative metamaterials seen as band-limited non-foster impedances in inductive power transmission systems. Journal of Microwaves, Optoelectronics and Electromagnetic Applications, v. 18, n. 4, p. 492-504, 2019. DOI: 10.1590/2179-10742019v18i41625. Disponível em: http://repositorio.ipen.br/handle/123456789/30842. Acesso em: 20 Mar 2026.
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