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

Table 1

Indoor measured results of the rectenna at 1 meter from Tx (Freq = 0.88 GHz, Tx antenna gain = 8 dBi, Rx antenna gain = 0.95 dBi).

Tx power (dBm)	Power density (μW/cm^2)	Rx power (dBm)	(V) (8.2 kΩ load)	Eff (%)
15	1.59	−7.4	0.87	50
20	5.02	−2.4	1.67	59
25	15.9	2.6	3.04	62
27	25.2	4.6	3.72	58