Power Transfer for a Moving Vehicle

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Effect of impedance

Matching frequency：about １ MHz

Change of S21 according to complex impedance of the tire

Port 2

Complex impedance
of the tire

-0.19 dB

-0.14 dB

-0.13 dB

-0.25 dB

Port 1

Amount of change
in real part [%]

Amount of change
in imaginary part [%]


	Impedance might change if a different tire is used.
	Therefore, the transmission characteristics were simulated when the impedance of the tire was changed.
	This figure shows the simulation results; each axis shows the amount of change in the real and imaginary parts.
	The vertical axis is S21.
	From these results, even if the impedance of the tire changes, the amount of change of S21 is small.
	Moreover, the matching frequency is not changed for all the results.
	[Fig. edits: Space all number and units (700 ohm, 2000 ohm, 1 MHz, 220 uH, 120 pF).]
	[Please confirm “Amount of change” and not “Amount of charge” in axis labels.]