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Virtual magnetic TL-based channel modeling of SWIPT systems assisted by MTMs
Autor
ALMEIDA, JORGE V. de
SILVA, EDUARDO C. da
MOSSO, MARBEY M.
SARTORI, CARLOS A.F.
SIMP??SIO BRASILEIRO DE MICRO-ONDAS E OPTOELETR??NICA, 19.; CONGRESSO BRASILEIRO DE ELETROMAGNETISMO, 14.
Resumen
This paper describes a general methodology for
the description of inductive power and data transfer based on
virtual magnetic transmission-lines (VMGTLs). This approach
presents a better physical insight on the channel behavior since
the model correctly preserves the energy flow between the
transmitting and receiving coils. Particularly, the virtual-TL
analogy clarifies the mechanism of transmission gain
improvement between any two coils assisted by MTM lenses.
Based on the results of this work, these lenses do not enhance the
magnetic coupling between the drivers, as usually claimed, but
create conditions to propagating near-field modes to increase
their power transfer. This approach also reveals that MTMs
could be employed not only for the increasing of power transfer
but also for enlarging the inductive channel bandwidth.