Table 1.

Ability Comparison of different WPT technologies.

WPT Technologies		Power Range	Frequency Range	Transmission Distance	Transmission Efficiency
Far Field	US-WPT	0.1 mW~10 W	50 kHz~5 MHz	1 mm~5 m	<20%
	MW-WPT	1 mW~3 MW	10 MHz~100 GHz	1 mm~10 m	<30%
	OPWT	1 W~1 MW	100 THz~1 PHz	1 m~10 km	<40%
Near Field	EC-WPT	1 W~3 kW	1 MHz~10 MHz	1 mm~10 cm	70~85%
	MCR-WPT	100 W~1 MW	10 kHz~3 MHz	1 cm~1 m	80~95%