ALMEIDA, JORGE V. deSIQUEIRA, GLAUCIO L.MOSSO, MARBEY M.MAIA, MARCO A.G.M.SARTORI, CARLOS A.F.2017-01-232017-01-23ALMEIDA, 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. <b>Proceedings...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/27014.http://repositorio.ipen.br/handle/123456789/27014Electrically 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.openAccessmetamaterialspower transmissioninductanceenergy densityantennasTexto completo de evento