Wireless power transfer
(WPT) using a metallic tube with axial slits was attempted to demonstrate WPT
using magnetic resonance coupling to the diagnostics infrastructure. The
transmission efficiency was measured at various distances using the
transmission and receiver resonator in the
tube. Furthermore, the transmission and receiver resonator were set
respectively outside and inside of the tube. Experiment results were assessed
computationally using the finite-difference time-domain (FDTD) simulation. As a
result, the transmission efficiency of the transmitter and receiver resonators
in the metallic slit tube was higher than that of the case without a metallic
tube in the range of the normalized transmission-distance of x/d > 0.4. In the simulation, the current density on the metallic tube around
both transmitter and receiver coil were connected. These results reveal that
the slit on the tube plays a role of the relay coil.
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