Metamaterial-enhanced coupling seen as non-Foster impedance matching

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2016
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INTERNATIONAL SYMPOSIUM ON ELECTRIC AND MAGNETIC FIELDS, 10th
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Electrically small antennas (ESA) are characterized by high-Q impedances presenting high reactance and low radiation resistance. Since in most wireless power transmission (WPT) applications, such as inductive power transmission (IPT), to use a full-size antenna is neither practical or desired, the system overall efficiency is usually very poor due to the drivers large reactance. In the last decade, various works have demonstrated that a class of artificial material called metamaterials (MTMs) can synthesize munegative (MNG) media capable of evanescent-wave focusing which largely enhances the coupling between ESA. In the present work, MTM-enhanced coupling in IPT systems is examined. Adopting a lumped element approach to describe the general MTM-enhanced IPT system, it is evidenced that MNG media can be interpreted as a negative inductance (a non-Foster reactance) from a circuital point of view. This paper also presents an approach based on energy density to calculate the module of the MNG slab equivalent inductor.

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ALMEIDA, JORGE V. de; SIQUEIRA, GLAUCIO L.; MOSSO, MARBEY M.; MAIA, MARCO A.G.M.; SARTORI, CARLOS A.F. Metamaterial-enhanced coupling seen as non-Foster impedance matching. In: INTERNATIONAL SYMPOSIUM ON ELECTRIC AND MAGNETIC FIELDS, 10th, April 12-14, 2016, Lyon, France. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/27014. Acesso em: 16 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.

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