A Compact Dual-Band Rectenna for GSM900 and GSM1800 Energy Harvesting

Table 2

Indoor measured results of the rectenna at 1 meter from Tx (Freq = 1.85 GHz, Tx antenna gain = 8.8 dBi, Rx antenna gain = 3.15 dBi).

Tx power (dBm)	Power density (μW/cm^2)	Rx power (dBm)	(V) (8.2 kΩ load)	Eff (%)
15	1.91	−10.8	0.45	30
20	6.04	−5.8	1.01	47
25	19.1	−0.83	1.84	50
27	30.3	1.16	2.27	48