Table 1.

Comparison among several RF energy harvesters.

Frequency	Broadcasting Power	Distance	Energy Harvested
1 MHz [This work]	10 KW	2.5 km	62 μW
1.27 MHz [25,26]	50 KW	2.5 km	0.6 μW
902–928 MHz [27]	4 W	15 m	5.5 μW
868 MHZ [28]	1.78 W	25 m	2.3 μW
915 MHz [29]	3 W	11 m	1 μW
674–680 MHz [30]	960 KW	4.1 km	60 μW