State-of-the-Art Developments of Acoustic Energy Transfer

Table 3

Comparison of WPTs.

WPT type	Frequency; (min–max)	Active range; (max)	Efficiency %; (max)	Power level; (max)
Acoustic	20.46 kHz–30 MHz	8.6 m	88	1.068 kW
Inductive	10.2 kHz–27 MHz	7 m	91	30 kW
Capacitive	20 kHz–15 MHz	1 mm	94.3	1.03 kW